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Finding the Fourth Proportional to 278,475.60, 417,713.40 and 91,493.20

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Solution

The fourth proportional to 278,475.60, 417,713.40 and 91,493.20 is: 137,239.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,475.60 : 417,713.40 = 91,493.20 : x
  2. Step 2: Convert to fraction form
    278,475.60/417,713.40 = 91,493.20/x
  3. Step 3: Cross multiply
    278,475.60x = 417,713.40 × 91,493.20
  4. Step 4: Simplify right side
    278,475.60x = 38,217,935,648.88
  5. Step 5: Solve for x
    x = 38,217,935,648.88/278,475.60
  6. Step 6: Final answer
    x = 137,239.80

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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.