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Finding the Fourth Proportional to 185.65, 256.15 and 126.53

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Solution

The fourth proportional to 185.65, 256.15 and 126.53 is: 174.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.65 : 256.15 = 126.53 : x
  2. Step 2: Convert to fraction form
    185.65/256.15 = 126.53/x
  3. Step 3: Cross multiply
    185.65x = 256.15 × 126.53
  4. Step 4: Simplify right side
    185.65x = 32,410.66
  5. Step 5: Solve for x
    x = 32,410.66/185.65
  6. Step 6: Final answer
    x = 174.58

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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.