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Finding the Fourth Proportional to 487,278.71, 731,042.62 and 187,678.85

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Solution

The fourth proportional to 487,278.71, 731,042.62 and 187,678.85 is: 281,566.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,278.71 : 731,042.62 = 187,678.85 : x
  2. Step 2: Convert to fraction form
    487,278.71/731,042.62 = 187,678.85/x
  3. Step 3: Cross multiply
    487,278.71x = 731,042.62 × 187,678.85
  4. Step 4: Simplify right side
    487,278.71x = 137,201,236,140.47
  5. Step 5: Solve for x
    x = 137,201,236,140.47/487,278.71
  6. Step 6: Final answer
    x = 281,566.24

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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.