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Finding the Fourth Proportional to 454.20, 626.80 and 267.68

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Solution

The fourth proportional to 454.20, 626.80 and 267.68 is: 369.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.20 : 626.80 = 267.68 : x
  2. Step 2: Convert to fraction form
    454.20/626.80 = 267.68/x
  3. Step 3: Cross multiply
    454.20x = 626.80 × 267.68
  4. Step 4: Simplify right side
    454.20x = 167,781.82
  5. Step 5: Solve for x
    x = 167,781.82/454.20
  6. Step 6: Final answer
    x = 369.40

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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.