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Finding the Fourth Proportional to 675.28, 1,012.92 and 242.43

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Solution

The fourth proportional to 675.28, 1,012.92 and 242.43 is: 363.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.28 : 1,012.92 = 242.43 : x
  2. Step 2: Convert to fraction form
    675.28/1,012.92 = 242.43/x
  3. Step 3: Cross multiply
    675.28x = 1,012.92 × 242.43
  4. Step 4: Simplify right side
    675.28x = 245,562.20
  5. Step 5: Solve for x
    x = 245,562.20/675.28
  6. Step 6: Final answer
    x = 363.65

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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.