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Finding the Fourth Proportional to 267.71, 399.22 and 265.28

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Solution

The fourth proportional to 267.71, 399.22 and 265.28 is: 395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.71 : 399.22 = 265.28 : x
  2. Step 2: Convert to fraction form
    267.71/399.22 = 265.28/x
  3. Step 3: Cross multiply
    267.71x = 399.22 × 265.28
  4. Step 4: Simplify right side
    267.71x = 105,905.08
  5. Step 5: Solve for x
    x = 105,905.08/267.71
  6. Step 6: Final answer
    x = 395.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.