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Finding the Fourth Proportional to 278,505.38, 417,708.67 and 126,666.88

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Solution

The fourth proportional to 278,505.38, 417,708.67 and 126,666.88 is: 189,977.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,505.38 : 417,708.67 = 126,666.88 : x
  2. Step 2: Convert to fraction form
    278,505.38/417,708.67 = 126,666.88/x
  3. Step 3: Cross multiply
    278,505.38x = 417,708.67 × 126,666.88
  4. Step 4: Simplify right side
    278,505.38x = 52,909,853,977.85
  5. Step 5: Solve for x
    x = 52,909,853,977.85/278,505.38
  6. Step 6: Final answer
    x = 189,977.85

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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.