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Finding the Third Proportional to 89.75 and 218.19

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Solution

The third proportional to 89.75 and 218.19 is: 530.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.75 : 218.19 = 218.19 : x
  2. Step 2: Convert to fraction form
    89.75/218.19 = 218.19/x
  3. Step 3: Cross multiply
    89.75x = 218.19 × 218.19
  4. Step 4: Simplify right side
    89.75x = 47,605.79
  5. Step 5: Solve for x
    x = 47,605.79/89.75
  6. Step 6: Final answer
    x = 530.43

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Why These Related Problems?

These problems maintain the same ratio (2.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.