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Finding the Fourth Proportional to 29.70, 44.49 and 21.69

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Solution

The fourth proportional to 29.70, 44.49 and 21.69 is: 32.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.70 : 44.49 = 21.69 : x
  2. Step 2: Convert to fraction form
    29.70/44.49 = 21.69/x
  3. Step 3: Cross multiply
    29.70x = 44.49 × 21.69
  4. Step 4: Simplify right side
    29.70x = 964.99
  5. Step 5: Solve for x
    x = 964.99/29.70
  6. Step 6: Final answer
    x = 32.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.