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Finding the Fourth Proportional to 487,943.80, 731,915.70 and 338,644.60

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Solution

The fourth proportional to 487,943.80, 731,915.70 and 338,644.60 is: 507,966.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,943.80 : 731,915.70 = 338,644.60 : x
  2. Step 2: Convert to fraction form
    487,943.80/731,915.70 = 338,644.60/x
  3. Step 3: Cross multiply
    487,943.80x = 731,915.70 × 338,644.60
  4. Step 4: Simplify right side
    487,943.80x = 247,859,299,460.22
  5. Step 5: Solve for x
    x = 247,859,299,460.22/487,943.80
  6. Step 6: Final answer
    x = 507,966.90

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.