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Finding the Fourth Proportional to 487,398.80, 731,098.20 and 155,008.40

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Solution

The fourth proportional to 487,398.80, 731,098.20 and 155,008.40 is: 232,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,398.80 : 731,098.20 = 155,008.40 : x
  2. Step 2: Convert to fraction form
    487,398.80/731,098.20 = 155,008.40/x
  3. Step 3: Cross multiply
    487,398.80x = 731,098.20 × 155,008.40
  4. Step 4: Simplify right side
    487,398.80x = 113,326,362,224.88
  5. Step 5: Solve for x
    x = 113,326,362,224.88/487,398.80
  6. Step 6: Final answer
    x = 232,512.60

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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.