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Finding the Fourth Proportional to 29.01, 43.21 and 28.47

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Solution

The fourth proportional to 29.01, 43.21 and 28.47 is: 42.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.01 : 43.21 = 28.47 : x
  2. Step 2: Convert to fraction form
    29.01/43.21 = 28.47/x
  3. Step 3: Cross multiply
    29.01x = 43.21 × 28.47
  4. Step 4: Simplify right side
    29.01x = 1,230.12
  5. Step 5: Solve for x
    x = 1,230.12/29.01
  6. Step 6: Final answer
    x = 42.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.