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Finding the Fourth Proportional to 398.60, 549.96 and 267.64

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Solution

The fourth proportional to 398.60, 549.96 and 267.64 is: 369.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.60 : 549.96 = 267.64 : x
  2. Step 2: Convert to fraction form
    398.60/549.96 = 267.64/x
  3. Step 3: Cross multiply
    398.60x = 549.96 × 267.64
  4. Step 4: Simplify right side
    398.60x = 147,191.29
  5. Step 5: Solve for x
    x = 147,191.29/398.60
  6. Step 6: Final answer
    x = 369.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.