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Finding the Fourth Proportional to 465.28, 642.12 and 268.80

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Solution

The fourth proportional to 465.28, 642.12 and 268.80 is: 370.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.28 : 642.12 = 268.80 : x
  2. Step 2: Convert to fraction form
    465.28/642.12 = 268.80/x
  3. Step 3: Cross multiply
    465.28x = 642.12 × 268.80
  4. Step 4: Simplify right side
    465.28x = 172,601.86
  5. Step 5: Solve for x
    x = 172,601.86/465.28
  6. Step 6: Final answer
    x = 370.96

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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.