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Finding the Fourth Proportional to 523.71, 785.72 and 249.80

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Solution

The fourth proportional to 523.71, 785.72 and 249.80 is: 374.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.71 : 785.72 = 249.80 : x
  2. Step 2: Convert to fraction form
    523.71/785.72 = 249.80/x
  3. Step 3: Cross multiply
    523.71x = 785.72 × 249.80
  4. Step 4: Simplify right side
    523.71x = 196,273.57
  5. Step 5: Solve for x
    x = 196,273.57/523.71
  6. Step 6: Final answer
    x = 374.78

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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.