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Finding the Fourth Proportional to 637.20, 955.80 and 252.72

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Solution

The fourth proportional to 637.20, 955.80 and 252.72 is: 379.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.20 : 955.80 = 252.72 : x
  2. Step 2: Convert to fraction form
    637.20/955.80 = 252.72/x
  3. Step 3: Cross multiply
    637.20x = 955.80 × 252.72
  4. Step 4: Simplify right side
    637.20x = 241,549.78
  5. Step 5: Solve for x
    x = 241,549.78/637.20
  6. Step 6: Final answer
    x = 379.08

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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.