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Finding the Fourth Proportional to 398,711.12, 550,234.62 and 217,432.97

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Solution

The fourth proportional to 398,711.12, 550,234.62 and 217,432.97 is: 300,064.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,711.12 : 550,234.62 = 217,432.97 : x
  2. Step 2: Convert to fraction form
    398,711.12/550,234.62 = 217,432.97/x
  3. Step 3: Cross multiply
    398,711.12x = 550,234.62 × 217,432.97
  4. Step 4: Simplify right side
    398,711.12x = 119,639,144,872.25
  5. Step 5: Solve for x
    x = 119,639,144,872.25/398,711.12
  6. Step 6: Final answer
    x = 300,064.73

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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.