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Finding the Fourth Proportional to 878,306.78, 1,212,064.17 and 475,898.78

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Solution

The fourth proportional to 878,306.78, 1,212,064.17 and 475,898.78 is: 656,740.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,306.78 : 1,212,064.17 = 475,898.78 : x
  2. Step 2: Convert to fraction form
    878,306.78/1,212,064.17 = 475,898.78/x
  3. Step 3: Cross multiply
    878,306.78x = 1,212,064.17 × 475,898.78
  4. Step 4: Simplify right side
    878,306.78x = 576,819,859,784.71
  5. Step 5: Solve for x
    x = 576,819,859,784.71/878,306.78
  6. Step 6: Final answer
    x = 656,740.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.