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Finding the Fourth Proportional to 267.78, 369.53 and 149.75

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Solution

The fourth proportional to 267.78, 369.53 and 149.75 is: 206.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.78 : 369.53 = 149.75 : x
  2. Step 2: Convert to fraction form
    267.78/369.53 = 149.75/x
  3. Step 3: Cross multiply
    267.78x = 369.53 × 149.75
  4. Step 4: Simplify right side
    267.78x = 55,337.12
  5. Step 5: Solve for x
    x = 55,337.12/267.78
  6. Step 6: Final answer
    x = 206.65

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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.