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Finding the Fourth Proportional to 487,855.56, 731,761.38 and 203,428.92

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Solution

The fourth proportional to 487,855.56, 731,761.38 and 203,428.92 is: 305,134.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,855.56 : 731,761.38 = 203,428.92 : x
  2. Step 2: Convert to fraction form
    487,855.56/731,761.38 = 203,428.92/x
  3. Step 3: Cross multiply
    487,855.56x = 731,761.38 × 203,428.92
  4. Step 4: Simplify right side
    487,855.56x = 148,861,427,231.11
  5. Step 5: Solve for x
    x = 148,861,427,231.11/487,855.56
  6. Step 6: Final answer
    x = 305,134.22

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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.