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Finding the Fourth Proportional to 279,452.20, 419,456.40 and 129,726.40

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Solution

The fourth proportional to 279,452.20, 419,456.40 and 129,726.40 is: 194,718.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,452.20 : 419,456.40 = 129,726.40 : x
  2. Step 2: Convert to fraction form
    279,452.20/419,456.40 = 129,726.40/x
  3. Step 3: Cross multiply
    279,452.20x = 419,456.40 × 129,726.40
  4. Step 4: Simplify right side
    279,452.20x = 54,414,568,728.96
  5. Step 5: Solve for x
    x = 54,414,568,728.96/279,452.20
  6. Step 6: Final answer
    x = 194,718.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.