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Finding the Fourth Proportional to 714,299.16, 985,744.89 and 392,039.25

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Solution

The fourth proportional to 714,299.16, 985,744.89 and 392,039.25 is: 541,020.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,299.16 : 985,744.89 = 392,039.25 : x
  2. Step 2: Convert to fraction form
    714,299.16/985,744.89 = 392,039.25/x
  3. Step 3: Cross multiply
    714,299.16x = 985,744.89 × 392,039.25
  4. Step 4: Simplify right side
    714,299.16x = 386,450,687,366.93
  5. Step 5: Solve for x
    x = 386,450,687,366.93/714,299.16
  6. Step 6: Final answer
    x = 541,020.78

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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.