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Finding the Fourth Proportional to 715,287.32, 987,095.68 and 392,996.62

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Solution

The fourth proportional to 715,287.32, 987,095.68 and 392,996.62 is: 542,334.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,287.32 : 987,095.68 = 392,996.62 : x
  2. Step 2: Convert to fraction form
    715,287.32/987,095.68 = 392,996.62/x
  3. Step 3: Cross multiply
    715,287.32x = 987,095.68 × 392,996.62
  4. Step 4: Simplify right side
    715,287.32x = 387,925,265,856.60
  5. Step 5: Solve for x
    x = 387,925,265,856.60/715,287.32
  6. Step 6: Final answer
    x = 542,334.88

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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.