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Finding the Fourth Proportional to 34.62, 47.78 and 29.15

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Solution

The fourth proportional to 34.62, 47.78 and 29.15 is: 40.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.62 : 47.78 = 29.15 : x
  2. Step 2: Convert to fraction form
    34.62/47.78 = 29.15/x
  3. Step 3: Cross multiply
    34.62x = 47.78 × 29.15
  4. Step 4: Simplify right side
    34.62x = 1,392.40
  5. Step 5: Solve for x
    x = 1,392.40/34.62
  6. Step 6: Final answer
    x = 40.22

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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.