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Finding the Fourth Proportional to 51.49, 71.05 and 29.64

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Solution

The fourth proportional to 51.49, 71.05 and 29.64 is: 40.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.49 : 71.05 = 29.64 : x
  2. Step 2: Convert to fraction form
    51.49/71.05 = 29.64/x
  3. Step 3: Cross multiply
    51.49x = 71.05 × 29.64
  4. Step 4: Simplify right side
    51.49x = 2,105.77
  5. Step 5: Solve for x
    x = 2,105.77/51.49
  6. Step 6: Final answer
    x = 40.90

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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.