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Finding the Fourth Proportional to 152.20, 228.48 and 115.55

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Solution

The fourth proportional to 152.20, 228.48 and 115.55 is: 173.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.20 : 228.48 = 115.55 : x
  2. Step 2: Convert to fraction form
    152.20/228.48 = 115.55/x
  3. Step 3: Cross multiply
    152.20x = 228.48 × 115.55
  4. Step 4: Simplify right side
    152.20x = 26,400.15
  5. Step 5: Solve for x
    x = 26,400.15/152.20
  6. Step 6: Final answer
    x = 173.46

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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.