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Finding the Fourth Proportional to 454.20, 626.58 and 279.51

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Solution

The fourth proportional to 454.20, 626.58 and 279.51 is: 385.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.20 : 626.58 = 279.51 : x
  2. Step 2: Convert to fraction form
    454.20/626.58 = 279.51/x
  3. Step 3: Cross multiply
    454.20x = 626.58 × 279.51
  4. Step 4: Simplify right side
    454.20x = 175,135.38
  5. Step 5: Solve for x
    x = 175,135.38/454.20
  6. Step 6: Final answer
    x = 385.59

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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.