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Finding the Fourth Proportional to 174.28, 240.64 and 115.30

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Solution

The fourth proportional to 174.28, 240.64 and 115.30 is: 159.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.28 : 240.64 = 115.30 : x
  2. Step 2: Convert to fraction form
    174.28/240.64 = 115.30/x
  3. Step 3: Cross multiply
    174.28x = 240.64 × 115.30
  4. Step 4: Simplify right side
    174.28x = 27,745.79
  5. Step 5: Solve for x
    x = 27,745.79/174.28
  6. Step 6: Final answer
    x = 159.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.