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Finding the Fourth Proportional to 461.27, 636.18 and 386.30

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Solution

The fourth proportional to 461.27, 636.18 and 386.30 is: 532.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.27 : 636.18 = 386.30 : x
  2. Step 2: Convert to fraction form
    461.27/636.18 = 386.30/x
  3. Step 3: Cross multiply
    461.27x = 636.18 × 386.30
  4. Step 4: Simplify right side
    461.27x = 245,756.33
  5. Step 5: Solve for x
    x = 245,756.33/461.27
  6. Step 6: Final answer
    x = 532.78

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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.