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Finding the Fourth Proportional to 675.15, 1,012.89 and 264.30

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Solution

The fourth proportional to 675.15, 1,012.89 and 264.30 is: 396.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.15 : 1,012.89 = 264.30 : x
  2. Step 2: Convert to fraction form
    675.15/1,012.89 = 264.30/x
  3. Step 3: Cross multiply
    675.15x = 1,012.89 × 264.30
  4. Step 4: Simplify right side
    675.15x = 267,706.83
  5. Step 5: Solve for x
    x = 267,706.83/675.15
  6. Step 6: Final answer
    x = 396.51

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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.