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Finding the Fourth Proportional to 465.91, 642.98 and 269.43

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Solution

The fourth proportional to 465.91, 642.98 and 269.43 is: 371.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.91 : 642.98 = 269.43 : x
  2. Step 2: Convert to fraction form
    465.91/642.98 = 269.43/x
  3. Step 3: Cross multiply
    465.91x = 642.98 × 269.43
  4. Step 4: Simplify right side
    465.91x = 173,238.10
  5. Step 5: Solve for x
    x = 173,238.10/465.91
  6. Step 6: Final answer
    x = 371.83

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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.