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Finding the Fourth Proportional to 627.60, 867 and 622.72

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Solution

The fourth proportional to 627.60, 867 and 622.72 is: 860.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.60 : 867 = 622.72 : x
  2. Step 2: Convert to fraction form
    627.60/867 = 622.72/x
  3. Step 3: Cross multiply
    627.60x = 867 × 622.72
  4. Step 4: Simplify right side
    627.60x = 539,898.24
  5. Step 5: Solve for x
    x = 539,898.24/627.60
  6. Step 6: Final answer
    x = 860.26

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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.