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Finding the Fourth Proportional to 261.48, 361.07 and 178.56

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Solution

The fourth proportional to 261.48, 361.07 and 178.56 is: 246.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.48 : 361.07 = 178.56 : x
  2. Step 2: Convert to fraction form
    261.48/361.07 = 178.56/x
  3. Step 3: Cross multiply
    261.48x = 361.07 × 178.56
  4. Step 4: Simplify right side
    261.48x = 64,472.66
  5. Step 5: Solve for x
    x = 64,472.66/261.48
  6. Step 6: Final answer
    x = 246.57

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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.