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Finding the Fourth Proportional to 152.25, 228.39 and 42.57

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Solution

The fourth proportional to 152.25, 228.39 and 42.57 is: 63.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.25 : 228.39 = 42.57 : x
  2. Step 2: Convert to fraction form
    152.25/228.39 = 42.57/x
  3. Step 3: Cross multiply
    152.25x = 228.39 × 42.57
  4. Step 4: Simplify right side
    152.25x = 9,722.56
  5. Step 5: Solve for x
    x = 9,722.56/152.25
  6. Step 6: Final answer
    x = 63.86

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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.