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Finding the Fourth Proportional to 370.60, 553.90 and 267.20

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Solution

The fourth proportional to 370.60, 553.90 and 267.20 is: 399.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.60 : 553.90 = 267.20 : x
  2. Step 2: Convert to fraction form
    370.60/553.90 = 267.20/x
  3. Step 3: Cross multiply
    370.60x = 553.90 × 267.20
  4. Step 4: Simplify right side
    370.60x = 148,002.08
  5. Step 5: Solve for x
    x = 148,002.08/370.60
  6. Step 6: Final answer
    x = 399.36

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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.