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Finding the Fourth Proportional to 143.44, 215.32 and 115.28

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Solution

The fourth proportional to 143.44, 215.32 and 115.28 is: 173.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.44 : 215.32 = 115.28 : x
  2. Step 2: Convert to fraction form
    143.44/215.32 = 115.28/x
  3. Step 3: Cross multiply
    143.44x = 215.32 × 115.28
  4. Step 4: Simplify right side
    143.44x = 24,822.09
  5. Step 5: Solve for x
    x = 24,822.09/143.44
  6. Step 6: Final answer
    x = 173.05

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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.