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Finding the Fourth Proportional to 267.60, 399.76 and 235.20

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Solution

The fourth proportional to 267.60, 399.76 and 235.20 is: 351.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.60 : 399.76 = 235.20 : x
  2. Step 2: Convert to fraction form
    267.60/399.76 = 235.20/x
  3. Step 3: Cross multiply
    267.60x = 399.76 × 235.20
  4. Step 4: Simplify right side
    267.60x = 94,023.55
  5. Step 5: Solve for x
    x = 94,023.55/267.60
  6. Step 6: Final answer
    x = 351.36

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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.