Home / 712,041.71-982,619.01-389,772.38

Finding the Fourth Proportional to 712,041.71, 982,619.01 and 389,772.38

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Solution

The fourth proportional to 712,041.71, 982,619.01 and 389,772.38 is: 537,886.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,041.71 : 982,619.01 = 389,772.38 : x
  2. Step 2: Convert to fraction form
    712,041.71/982,619.01 = 389,772.38/x
  3. Step 3: Cross multiply
    712,041.71x = 982,619.01 × 389,772.38
  4. Step 4: Simplify right side
    712,041.71x = 382,997,752,617.49
  5. Step 5: Solve for x
    x = 382,997,752,617.49/712,041.71
  6. Step 6: Final answer
    x = 537,886.69

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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.