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Finding the Fourth Proportional to 34.80, 47.99 and 22.50

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Solution

The fourth proportional to 34.80, 47.99 and 22.50 is: 31.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.80 : 47.99 = 22.50 : x
  2. Step 2: Convert to fraction form
    34.80/47.99 = 22.50/x
  3. Step 3: Cross multiply
    34.80x = 47.99 × 22.50
  4. Step 4: Simplify right side
    34.80x = 1,079.97
  5. Step 5: Solve for x
    x = 1,079.97/34.80
  6. Step 6: Final answer
    x = 31.04

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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.