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Finding the Fourth Proportional to 249.20, 373.77 and 66.59

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Solution

The fourth proportional to 249.20, 373.77 and 66.59 is: 99.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.20 : 373.77 = 66.59 : x
  2. Step 2: Convert to fraction form
    249.20/373.77 = 66.59/x
  3. Step 3: Cross multiply
    249.20x = 373.77 × 66.59
  4. Step 4: Simplify right side
    249.20x = 24,888.88
  5. Step 5: Solve for x
    x = 24,888.88/249.20
  6. Step 6: Final answer
    x = 99.88

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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.