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Finding the Fourth Proportional to 63.99, 88.31 and 34.88

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Solution

The fourth proportional to 63.99, 88.31 and 34.88 is: 48.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.99 : 88.31 = 34.88 : x
  2. Step 2: Convert to fraction form
    63.99/88.31 = 34.88/x
  3. Step 3: Cross multiply
    63.99x = 88.31 × 34.88
  4. Step 4: Simplify right side
    63.99x = 3,080.61
  5. Step 5: Solve for x
    x = 3,080.61/63.99
  6. Step 6: Final answer
    x = 48.14

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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.