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Finding the Fourth Proportional to 63.46, 87.51 and 38.89

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Solution

The fourth proportional to 63.46, 87.51 and 38.89 is: 53.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.46 : 87.51 = 38.89 : x
  2. Step 2: Convert to fraction form
    63.46/87.51 = 38.89/x
  3. Step 3: Cross multiply
    63.46x = 87.51 × 38.89
  4. Step 4: Simplify right side
    63.46x = 3,403.26
  5. Step 5: Solve for x
    x = 3,403.26/63.46
  6. Step 6: Final answer
    x = 53.63

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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.