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Finding the Fourth Proportional to 465.16, 641.92 and 276.20

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Solution

The fourth proportional to 465.16, 641.92 and 276.20 is: 381.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.16 : 641.92 = 276.20 : x
  2. Step 2: Convert to fraction form
    465.16/641.92 = 276.20/x
  3. Step 3: Cross multiply
    465.16x = 641.92 × 276.20
  4. Step 4: Simplify right side
    465.16x = 177,298.30
  5. Step 5: Solve for x
    x = 177,298.30/465.16
  6. Step 6: Final answer
    x = 381.16

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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.