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Finding the Fourth Proportional to 637.68, 872.18 and 627.60

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Solution

The fourth proportional to 637.68, 872.18 and 627.60 is: 858.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.68 : 872.18 = 627.60 : x
  2. Step 2: Convert to fraction form
    637.68/872.18 = 627.60/x
  3. Step 3: Cross multiply
    637.68x = 872.18 × 627.60
  4. Step 4: Simplify right side
    637.68x = 547,380.17
  5. Step 5: Solve for x
    x = 547,380.17/637.68
  6. Step 6: Final answer
    x = 858.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.