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Finding the Fourth Proportional to 465.98, 642.92 and 269.55

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Solution

The fourth proportional to 465.98, 642.92 and 269.55 is: 371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.98 : 642.92 = 269.55 : x
  2. Step 2: Convert to fraction form
    465.98/642.92 = 269.55/x
  3. Step 3: Cross multiply
    465.98x = 642.92 × 269.55
  4. Step 4: Simplify right side
    465.98x = 173,297.74
  5. Step 5: Solve for x
    x = 173,297.74/465.98
  6. Step 6: Final answer
    x = 371.90

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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.