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Finding the Fourth Proportional to 267.60, 401.86 and 207.16

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Solution

The fourth proportional to 267.60, 401.86 and 207.16 is: 311.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.60 : 401.86 = 207.16 : x
  2. Step 2: Convert to fraction form
    267.60/401.86 = 207.16/x
  3. Step 3: Cross multiply
    267.60x = 401.86 × 207.16
  4. Step 4: Simplify right side
    267.60x = 83,248.57
  5. Step 5: Solve for x
    x = 83,248.57/267.60
  6. Step 6: Final answer
    x = 311.09

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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.