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Finding the Fourth Proportional to 29.02, 43.24 and 28.42

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Solution

The fourth proportional to 29.02, 43.24 and 28.42 is: 42.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.02 : 43.24 = 28.42 : x
  2. Step 2: Convert to fraction form
    29.02/43.24 = 28.42/x
  3. Step 3: Cross multiply
    29.02x = 43.24 × 28.42
  4. Step 4: Simplify right side
    29.02x = 1,228.74
  5. Step 5: Solve for x
    x = 1,228.74/29.02
  6. Step 6: Final answer
    x = 42.34

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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.