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Finding the Fourth Proportional to 386.10, 532.71 and 254.88

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Solution

The fourth proportional to 386.10, 532.71 and 254.88 is: 351.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.10 : 532.71 = 254.88 : x
  2. Step 2: Convert to fraction form
    386.10/532.71 = 254.88/x
  3. Step 3: Cross multiply
    386.10x = 532.71 × 254.88
  4. Step 4: Simplify right side
    386.10x = 135,777.12
  5. Step 5: Solve for x
    x = 135,777.12/386.10
  6. Step 6: Final answer
    x = 351.66

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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.