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Finding the Fourth Proportional to 261.27, 360.18 and 178.38

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Solution

The fourth proportional to 261.27, 360.18 and 178.38 is: 245.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.27 : 360.18 = 178.38 : x
  2. Step 2: Convert to fraction form
    261.27/360.18 = 178.38/x
  3. Step 3: Cross multiply
    261.27x = 360.18 × 178.38
  4. Step 4: Simplify right side
    261.27x = 64,248.91
  5. Step 5: Solve for x
    x = 64,248.91/261.27
  6. Step 6: Final answer
    x = 245.91

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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.