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Finding the Fourth Proportional to 487,584.40, 731,808.60 and 287,654.80

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Solution

The fourth proportional to 487,584.40, 731,808.60 and 287,654.80 is: 431,737.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,584.40 : 731,808.60 = 287,654.80 : x
  2. Step 2: Convert to fraction form
    487,584.40/731,808.60 = 287,654.80/x
  3. Step 3: Cross multiply
    487,584.40x = 731,808.60 × 287,654.80
  4. Step 4: Simplify right side
    487,584.40x = 210,508,256,471.28
  5. Step 5: Solve for x
    x = 210,508,256,471.28/487,584.40
  6. Step 6: Final answer
    x = 431,737.06

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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.