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Finding the Fourth Proportional to 675.28, 1,012.80 and 264.61

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Solution

The fourth proportional to 675.28, 1,012.80 and 264.61 is: 396.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.28 : 1,012.80 = 264.61 : x
  2. Step 2: Convert to fraction form
    675.28/1,012.80 = 264.61/x
  3. Step 3: Cross multiply
    675.28x = 1,012.80 × 264.61
  4. Step 4: Simplify right side
    675.28x = 267,997.01
  5. Step 5: Solve for x
    x = 267,997.01/675.28
  6. Step 6: Final answer
    x = 396.87

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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.