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Finding the Fourth Proportional to 454.11, 626.45 and 279.15

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Solution

The fourth proportional to 454.11, 626.45 and 279.15 is: 385.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.11 : 626.45 = 279.15 : x
  2. Step 2: Convert to fraction form
    454.11/626.45 = 279.15/x
  3. Step 3: Cross multiply
    454.11x = 626.45 × 279.15
  4. Step 4: Simplify right side
    454.11x = 174,871.25
  5. Step 5: Solve for x
    x = 174,871.25/454.11
  6. Step 6: Final answer
    x = 385.09

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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.