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Finding the Fourth Proportional to 454.05, 626.63 and 279.38

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Solution

The fourth proportional to 454.05, 626.63 and 279.38 is: 385.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.05 : 626.63 = 279.38 : x
  2. Step 2: Convert to fraction form
    454.05/626.63 = 279.38/x
  3. Step 3: Cross multiply
    454.05x = 626.63 × 279.38
  4. Step 4: Simplify right side
    454.05x = 175,063.36
  5. Step 5: Solve for x
    x = 175,063.36/454.05
  6. Step 6: Final answer
    x = 385.56

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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.