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Finding the Fourth Proportional to 487,665.40, 731,498.10 and 404,721.40

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Solution

The fourth proportional to 487,665.40, 731,498.10 and 404,721.40 is: 607,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,665.40 : 731,498.10 = 404,721.40 : x
  2. Step 2: Convert to fraction form
    487,665.40/731,498.10 = 404,721.40/x
  3. Step 3: Cross multiply
    487,665.40x = 731,498.10 × 404,721.40
  4. Step 4: Simplify right side
    487,665.40x = 296,052,935,129.34
  5. Step 5: Solve for x
    x = 296,052,935,129.34/487,665.40
  6. Step 6: Final answer
    x = 607,082.10

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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.