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Finding the Fourth Proportional to 279,562.69, 418,713.15 and 129,487.71

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Solution

The fourth proportional to 279,562.69, 418,713.15 and 129,487.71 is: 193,939.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,562.69 : 418,713.15 = 129,487.71 : x
  2. Step 2: Convert to fraction form
    279,562.69/418,713.15 = 129,487.71/x
  3. Step 3: Cross multiply
    279,562.69x = 418,713.15 × 129,487.71
  4. Step 4: Simplify right side
    279,562.69x = 54,218,208,267.77
  5. Step 5: Solve for x
    x = 54,218,208,267.77/279,562.69
  6. Step 6: Final answer
    x = 193,939.36

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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.