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Finding the Fourth Proportional to 638.97, 958.35 and 228.04

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Solution

The fourth proportional to 638.97, 958.35 and 228.04 is: 342.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.97 : 958.35 = 228.04 : x
  2. Step 2: Convert to fraction form
    638.97/958.35 = 228.04/x
  3. Step 3: Cross multiply
    638.97x = 958.35 × 228.04
  4. Step 4: Simplify right side
    638.97x = 218,542.13
  5. Step 5: Solve for x
    x = 218,542.13/638.97
  6. Step 6: Final answer
    x = 342.02

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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.