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Finding the Fourth Proportional to 714,666.84, 986,242.17 and 392,397.81

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Solution

The fourth proportional to 714,666.84, 986,242.17 and 392,397.81 is: 541,510.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,666.84 : 986,242.17 = 392,397.81 : x
  2. Step 2: Convert to fraction form
    714,666.84/986,242.17 = 392,397.81/x
  3. Step 3: Cross multiply
    714,666.84x = 986,242.17 × 392,397.81
  4. Step 4: Simplify right side
    714,666.84x = 386,999,267,637.65
  5. Step 5: Solve for x
    x = 386,999,267,637.65/714,666.84
  6. Step 6: Final answer
    x = 541,510.04

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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.