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Finding the Fourth Proportional to 52.43, 72.31 and 38.66

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Solution

The fourth proportional to 52.43, 72.31 and 38.66 is: 53.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.43 : 72.31 = 38.66 : x
  2. Step 2: Convert to fraction form
    52.43/72.31 = 38.66/x
  3. Step 3: Cross multiply
    52.43x = 72.31 × 38.66
  4. Step 4: Simplify right side
    52.43x = 2,795.50
  5. Step 5: Solve for x
    x = 2,795.50/52.43
  6. Step 6: Final answer
    x = 53.32

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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.