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Finding the Fourth Proportional to 465.39, 642.31 and 268.97

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Solution

The fourth proportional to 465.39, 642.31 and 268.97 is: 371.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.39 : 642.31 = 268.97 : x
  2. Step 2: Convert to fraction form
    465.39/642.31 = 268.97/x
  3. Step 3: Cross multiply
    465.39x = 642.31 × 268.97
  4. Step 4: Simplify right side
    465.39x = 172,758.24
  5. Step 5: Solve for x
    x = 172,758.24/465.39
  6. Step 6: Final answer
    x = 371.21

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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.