Home / 718,890,638,220.90-992,100,265,702.80-398,106,473,328.88

Finding the Fourth Proportional to 718,890,638,220.90, 992,100,265,702.80 and 398,106,473,328.88

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Solution

The fourth proportional to 718,890,638,220.90, 992,100,265,702.80 and 398,106,473,328.88 is: 549,404,202,765.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,890,638,220.90 : 992,100,265,702.80 = 398,106,473,328.88 : x
  2. Step 2: Convert to fraction form
    718,890,638,220.90/992,100,265,702.80 = 398,106,473,328.88/x
  3. Step 3: Cross multiply
    718,890,638,220.90x = 992,100,265,702.80 × 398,106,473,328.88
  4. Step 4: Simplify right side
    718,890,638,220.90x = 394,961,537,967,586,522,693,632
  5. Step 5: Solve for x
    x = 394,961,537,967,586,522,693,632/718,890,638,220.90
  6. Step 6: Final answer
    x = 549,404,202,765.85

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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.