Home / 684,785.28-945,306.38-409,240.38

Finding the Fourth Proportional to 684,785.28, 945,306.38 and 409,240.38

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Solution

The fourth proportional to 684,785.28, 945,306.38 and 409,240.38 is: 564,932.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,785.28 : 945,306.38 = 409,240.38 : x
  2. Step 2: Convert to fraction form
    684,785.28/945,306.38 = 409,240.38/x
  3. Step 3: Cross multiply
    684,785.28x = 945,306.38 × 409,240.38
  4. Step 4: Simplify right side
    684,785.28x = 386,857,540,121.42
  5. Step 5: Solve for x
    x = 386,857,540,121.42/684,785.28
  6. Step 6: Final answer
    x = 564,932.62

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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.