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Finding the Fourth Proportional to 638.73, 879.60 and 599.18

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Solution

The fourth proportional to 638.73, 879.60 and 599.18 is: 825.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.73 : 879.60 = 599.18 : x
  2. Step 2: Convert to fraction form
    638.73/879.60 = 599.18/x
  3. Step 3: Cross multiply
    638.73x = 879.60 × 599.18
  4. Step 4: Simplify right side
    638.73x = 527,036.58
  5. Step 5: Solve for x
    x = 527,036.58/638.73
  6. Step 6: Final answer
    x = 825.13

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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.