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Finding the Fourth Proportional to 463.80, 639.87 and 267.28

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Solution

The fourth proportional to 463.80, 639.87 and 267.28 is: 368.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.80 : 639.87 = 267.28 : x
  2. Step 2: Convert to fraction form
    463.80/639.87 = 267.28/x
  3. Step 3: Cross multiply
    463.80x = 639.87 × 267.28
  4. Step 4: Simplify right side
    463.80x = 171,021.85
  5. Step 5: Solve for x
    x = 171,021.85/463.80
  6. Step 6: Final answer
    x = 368.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.