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Finding the Fourth Proportional to 638.73, 958.30 and 484.83

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Solution

The fourth proportional to 638.73, 958.30 and 484.83 is: 727.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.73 : 958.30 = 484.83 : x
  2. Step 2: Convert to fraction form
    638.73/958.30 = 484.83/x
  3. Step 3: Cross multiply
    638.73x = 958.30 × 484.83
  4. Step 4: Simplify right side
    638.73x = 464,611.38
  5. Step 5: Solve for x
    x = 464,611.38/638.73
  6. Step 6: Final answer
    x = 727.40

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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.