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Finding the Fourth Proportional to 267.79, 401.90 and 265.76

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Solution

The fourth proportional to 267.79, 401.90 and 265.76 is: 398.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.79 : 401.90 = 265.76 : x
  2. Step 2: Convert to fraction form
    267.79/401.90 = 265.76/x
  3. Step 3: Cross multiply
    267.79x = 401.90 × 265.76
  4. Step 4: Simplify right side
    267.79x = 106,808.94
  5. Step 5: Solve for x
    x = 106,808.94/267.79
  6. Step 6: Final answer
    x = 398.86

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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.