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Finding the Fourth Proportional to 487,508.90, 731,189.16 and 187,945.76

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Solution

The fourth proportional to 487,508.90, 731,189.16 and 187,945.76 is: 281,890.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,508.90 : 731,189.16 = 187,945.76 : x
  2. Step 2: Convert to fraction form
    487,508.90/731,189.16 = 187,945.76/x
  3. Step 3: Cross multiply
    487,508.90x = 731,189.16 × 187,945.76
  4. Step 4: Simplify right side
    487,508.90x = 137,423,902,379.96
  5. Step 5: Solve for x
    x = 137,423,902,379.96/487,508.90
  6. Step 6: Final answer
    x = 281,890.04

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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.