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Finding the Third Proportional to 218.88 and 474.69

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Solution

The third proportional to 218.88 and 474.69 is: 1,029.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.88 : 474.69 = 474.69 : x
  2. Step 2: Convert to fraction form
    218.88/474.69 = 474.69/x
  3. Step 3: Cross multiply
    218.88x = 474.69 × 474.69
  4. Step 4: Simplify right side
    218.88x = 225,328.22
  5. Step 5: Solve for x
    x = 225,328.22/218.88
  6. Step 6: Final answer
    x = 1,029.48

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.