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Finding the Fourth Proportional to 312,435.92, 431,158.20 and 176,470.13

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Solution

The fourth proportional to 312,435.92, 431,158.20 and 176,470.13 is: 243,526.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,435.92 : 431,158.20 = 176,470.13 : x
  2. Step 2: Convert to fraction form
    312,435.92/431,158.20 = 176,470.13/x
  3. Step 3: Cross multiply
    312,435.92x = 431,158.20 × 176,470.13
  4. Step 4: Simplify right side
    312,435.92x = 76,086,543,604.57
  5. Step 5: Solve for x
    x = 76,086,543,604.57/312,435.92
  6. Step 6: Final answer
    x = 243,526.88

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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.