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Finding the Fourth Proportional to 714,818.68, 986,411.10 and 392,571.16

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Solution

The fourth proportional to 714,818.68, 986,411.10 and 392,571.16 is: 541,726.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,818.68 : 986,411.10 = 392,571.16 : x
  2. Step 2: Convert to fraction form
    714,818.68/986,411.10 = 392,571.16/x
  3. Step 3: Cross multiply
    714,818.68x = 986,411.10 × 392,571.16
  4. Step 4: Simplify right side
    714,818.68x = 387,236,549,763.88
  5. Step 5: Solve for x
    x = 387,236,549,763.88/714,818.68
  6. Step 6: Final answer
    x = 541,726.96

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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.