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Finding the Fourth Proportional to 29.20, 43.12 and 29.20

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Solution

The fourth proportional to 29.20, 43.12 and 29.20 is: 43.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.20 : 43.12 = 29.20 : x
  2. Step 2: Convert to fraction form
    29.20/43.12 = 29.20/x
  3. Step 3: Cross multiply
    29.20x = 43.12 × 29.20
  4. Step 4: Simplify right side
    29.20x = 1,259.10
  5. Step 5: Solve for x
    x = 1,259.10/29.20
  6. Step 6: Final answer
    x = 43.12

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.