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Finding the Fourth Proportional to 63.55, 95.18 and 31.00

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Solution

The fourth proportional to 63.55, 95.18 and 31.00 is: 46.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.55 : 95.18 = 31.00 : x
  2. Step 2: Convert to fraction form
    63.55/95.18 = 31.00/x
  3. Step 3: Cross multiply
    63.55x = 95.18 × 31.00
  4. Step 4: Simplify right side
    63.55x = 2,949.95
  5. Step 5: Solve for x
    x = 2,949.95/63.55
  6. Step 6: Final answer
    x = 46.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.