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Finding the Fourth Proportional to 29.88, 40.91 and 29.79

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Solution

The fourth proportional to 29.88, 40.91 and 29.79 is: 40.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.88 : 40.91 = 29.79 : x
  2. Step 2: Convert to fraction form
    29.88/40.91 = 29.79/x
  3. Step 3: Cross multiply
    29.88x = 40.91 × 29.79
  4. Step 4: Simplify right side
    29.88x = 1,218.56
  5. Step 5: Solve for x
    x = 1,218.56/29.88
  6. Step 6: Final answer
    x = 40.78

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.