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Finding the Third Proportional to 218 and 469.38

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Solution

The third proportional to 218 and 469.38 is: 1,010.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    218 : 469.38 = 469.38 : x
  2. Step 2: Convert to fraction form
    218/469.38 = 469.38/x
  3. Step 3: Cross multiply
    218x = 469.38 × 469.38
  4. Step 4: Simplify right side
    218x = 220,312.89
  5. Step 5: Solve for x
    x = 220,312.89/218
  6. Step 6: Final answer
    x = 1,010.61

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.