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Finding the Fourth Proportional to 636.45, 879.96 and 627.13

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Solution

The fourth proportional to 636.45, 879.96 and 627.13 is: 867.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.45 : 879.96 = 627.13 : x
  2. Step 2: Convert to fraction form
    636.45/879.96 = 627.13/x
  3. Step 3: Cross multiply
    636.45x = 879.96 × 627.13
  4. Step 4: Simplify right side
    636.45x = 551,849.31
  5. Step 5: Solve for x
    x = 551,849.31/636.45
  6. Step 6: Final answer
    x = 867.07

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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.