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Finding the Fourth Proportional to 267.48, 399.25 and 243.40

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Solution

The fourth proportional to 267.48, 399.25 and 243.40 is: 363.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.48 : 399.25 = 243.40 : x
  2. Step 2: Convert to fraction form
    267.48/399.25 = 243.40/x
  3. Step 3: Cross multiply
    267.48x = 399.25 × 243.40
  4. Step 4: Simplify right side
    267.48x = 97,177.45
  5. Step 5: Solve for x
    x = 97,177.45/267.48
  6. Step 6: Final answer
    x = 363.31

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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.