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Finding the Fourth Proportional to 425.59, 638.49 and 194.55

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Solution

The fourth proportional to 425.59, 638.49 and 194.55 is: 291.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.59 : 638.49 = 194.55 : x
  2. Step 2: Convert to fraction form
    425.59/638.49 = 194.55/x
  3. Step 3: Cross multiply
    425.59x = 638.49 × 194.55
  4. Step 4: Simplify right side
    425.59x = 124,218.23
  5. Step 5: Solve for x
    x = 124,218.23/425.59
  6. Step 6: Final answer
    x = 291.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.