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Finding the Fourth Proportional to 267.49, 401.19 and 121.15

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Solution

The fourth proportional to 267.49, 401.19 and 121.15 is: 181.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.49 : 401.19 = 121.15 : x
  2. Step 2: Convert to fraction form
    267.49/401.19 = 121.15/x
  3. Step 3: Cross multiply
    267.49x = 401.19 × 121.15
  4. Step 4: Simplify right side
    267.49x = 48,603.36
  5. Step 5: Solve for x
    x = 48,603.36/267.49
  6. Step 6: Final answer
    x = 181.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.