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Finding the Fourth Proportional to 627.95, 866.80 and 451.17

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Solution

The fourth proportional to 627.95, 866.80 and 451.17 is: 622.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.95 : 866.80 = 451.17 : x
  2. Step 2: Convert to fraction form
    627.95/866.80 = 451.17/x
  3. Step 3: Cross multiply
    627.95x = 866.80 × 451.17
  4. Step 4: Simplify right side
    627.95x = 391,074.72
  5. Step 5: Solve for x
    x = 391,074.72/627.95
  6. Step 6: Final answer
    x = 622.78

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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.