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Finding the Fourth Proportional to 714,712.52, 986,319.17 and 392,423.89

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Solution

The fourth proportional to 714,712.52, 986,319.17 and 392,423.89 is: 541,553.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,712.52 : 986,319.17 = 392,423.89 : x
  2. Step 2: Convert to fraction form
    714,712.52/986,319.17 = 392,423.89/x
  3. Step 3: Cross multiply
    714,712.52x = 986,319.17 × 392,423.89
  4. Step 4: Simplify right side
    714,712.52x = 387,055,205,472.97
  5. Step 5: Solve for x
    x = 387,055,205,472.97/714,712.52
  6. Step 6: Final answer
    x = 541,553.69

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Double scale
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1.5x scale

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.