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Finding the Fourth Proportional to 278,748.80, 418,123.20 and 131,292.80

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Solution

The fourth proportional to 278,748.80, 418,123.20 and 131,292.80 is: 196,939.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,748.80 : 418,123.20 = 131,292.80 : x
  2. Step 2: Convert to fraction form
    278,748.80/418,123.20 = 131,292.80/x
  3. Step 3: Cross multiply
    278,748.80x = 418,123.20 × 131,292.80
  4. Step 4: Simplify right side
    278,748.80x = 54,896,565,672.96
  5. Step 5: Solve for x
    x = 54,896,565,672.96/278,748.80
  6. Step 6: Final answer
    x = 196,939.20

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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.