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Finding the Fourth Proportional to 638.50, 956.67 and 273.10

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Solution

The fourth proportional to 638.50, 956.67 and 273.10 is: 409.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.50 : 956.67 = 273.10 : x
  2. Step 2: Convert to fraction form
    638.50/956.67 = 273.10/x
  3. Step 3: Cross multiply
    638.50x = 956.67 × 273.10
  4. Step 4: Simplify right side
    638.50x = 261,266.58
  5. Step 5: Solve for x
    x = 261,266.58/638.50
  6. Step 6: Final answer
    x = 409.19

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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.