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Finding the Fourth Proportional to 638.28, 950.67 and 635.18

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Solution

The fourth proportional to 638.28, 950.67 and 635.18 is: 946.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.28 : 950.67 = 635.18 : x
  2. Step 2: Convert to fraction form
    638.28/950.67 = 635.18/x
  3. Step 3: Cross multiply
    638.28x = 950.67 × 635.18
  4. Step 4: Simplify right side
    638.28x = 603,841.82
  5. Step 5: Solve for x
    x = 603,841.82/638.28
  6. Step 6: Final answer
    x = 946.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.