Home / 718,890,638,220.25-992,100,265,701.85-398,106,473,328.20

Finding the Fourth Proportional to 718,890,638,220.25, 992,100,265,701.85 and 398,106,473,328.20

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Solution

The fourth proportional to 718,890,638,220.25, 992,100,265,701.85 and 398,106,473,328.20 is: 549,404,202,764.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,890,638,220.25 : 992,100,265,701.85 = 398,106,473,328.20 : x
  2. Step 2: Convert to fraction form
    718,890,638,220.25/992,100,265,701.85 = 398,106,473,328.20/x
  3. Step 3: Cross multiply
    718,890,638,220.25x = 992,100,265,701.85 × 398,106,473,328.20
  4. Step 4: Simplify right side
    718,890,638,220.25x = 394,961,537,966,533,651,726,336
  5. Step 5: Solve for x
    x = 394,961,537,966,533,651,726,336/718,890,638,220.25
  6. Step 6: Final answer
    x = 549,404,202,764.88

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.