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Finding the Fourth Proportional to 185.92, 256.42 and 152.88

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Solution

The fourth proportional to 185.92, 256.42 and 152.88 is: 210.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.92 : 256.42 = 152.88 : x
  2. Step 2: Convert to fraction form
    185.92/256.42 = 152.88/x
  3. Step 3: Cross multiply
    185.92x = 256.42 × 152.88
  4. Step 4: Simplify right side
    185.92x = 39,201.49
  5. Step 5: Solve for x
    x = 39,201.49/185.92
  6. Step 6: Final answer
    x = 210.85

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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.