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Finding the Fourth Proportional to 465.26, 641.90 and 268.70

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Solution

The fourth proportional to 465.26, 641.90 and 268.70 is: 370.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.26 : 641.90 = 268.70 : x
  2. Step 2: Convert to fraction form
    465.26/641.90 = 268.70/x
  3. Step 3: Cross multiply
    465.26x = 641.90 × 268.70
  4. Step 4: Simplify right side
    465.26x = 172,473.98
  5. Step 5: Solve for x
    x = 172,473.98/465.26
  6. Step 6: Final answer
    x = 370.71

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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.