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Finding the Fourth Proportional to 279,221.52, 418,879.32 and 129,401.04

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Solution

The fourth proportional to 279,221.52, 418,879.32 and 129,401.04 is: 194,123.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,221.52 : 418,879.32 = 129,401.04 : x
  2. Step 2: Convert to fraction form
    279,221.52/418,879.32 = 129,401.04/x
  3. Step 3: Cross multiply
    279,221.52x = 418,879.32 × 129,401.04
  4. Step 4: Simplify right side
    279,221.52x = 54,203,419,642.49
  5. Step 5: Solve for x
    x = 54,203,419,642.49/279,221.52
  6. Step 6: Final answer
    x = 194,123.36

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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.