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Finding the Third Proportional to 216.11 and 478.88

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Solution

The third proportional to 216.11 and 478.88 is: 1,061.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.11 : 478.88 = 478.88 : x
  2. Step 2: Convert to fraction form
    216.11/478.88 = 478.88/x
  3. Step 3: Cross multiply
    216.11x = 478.88 × 478.88
  4. Step 4: Simplify right side
    216.11x = 229,326.88
  5. Step 5: Solve for x
    x = 229,326.88/216.11
  6. Step 6: Final answer
    x = 1,061.18

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.