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Finding the Fourth Proportional to 714,728.46, 986,339.37 and 392,435.73

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Solution

The fourth proportional to 714,728.46, 986,339.37 and 392,435.73 is: 541,569.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,728.46 : 986,339.37 = 392,435.73 : x
  2. Step 2: Convert to fraction form
    714,728.46/986,339.37 = 392,435.73/x
  3. Step 3: Cross multiply
    714,728.46x = 986,339.37 × 392,435.73
  4. Step 4: Simplify right side
    714,728.46x = 387,074,810,693.69
  5. Step 5: Solve for x
    x = 387,074,810,693.69/714,728.46
  6. Step 6: Final answer
    x = 541,569.05

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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.