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Finding the Fourth Proportional to 465.18, 641.87 and 268.65

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Solution

The fourth proportional to 465.18, 641.87 and 268.65 is: 370.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.18 : 641.87 = 268.65 : x
  2. Step 2: Convert to fraction form
    465.18/641.87 = 268.65/x
  3. Step 3: Cross multiply
    465.18x = 641.87 × 268.65
  4. Step 4: Simplify right side
    465.18x = 172,438.38
  5. Step 5: Solve for x
    x = 172,438.38/465.18
  6. Step 6: Final answer
    x = 370.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.