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Finding the Fourth Proportional to 152.24, 228.48 and 115.79

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Solution

The fourth proportional to 152.24, 228.48 and 115.79 is: 173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.24 : 228.48 = 115.79 : x
  2. Step 2: Convert to fraction form
    152.24/228.48 = 115.79/x
  3. Step 3: Cross multiply
    152.24x = 228.48 × 115.79
  4. Step 4: Simplify right side
    152.24x = 26,456.27
  5. Step 5: Solve for x
    x = 26,456.27/152.24
  6. Step 6: Final answer
    x = 173.78

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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.