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Finding the Fourth Proportional to 267.81, 369.51 and 157.31

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Solution

The fourth proportional to 267.81, 369.51 and 157.31 is: 217.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.81 : 369.51 = 157.31 : x
  2. Step 2: Convert to fraction form
    267.81/369.51 = 157.31/x
  3. Step 3: Cross multiply
    267.81x = 369.51 × 157.31
  4. Step 4: Simplify right side
    267.81x = 58,125.77
  5. Step 5: Solve for x
    x = 58,125.77/267.81
  6. Step 6: Final answer
    x = 217.04

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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.