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Finding the Third Proportional to 216.42 and 552.45

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Solution

The third proportional to 216.42 and 552.45 is: 1,410.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.42 : 552.45 = 552.45 : x
  2. Step 2: Convert to fraction form
    216.42/552.45 = 552.45/x
  3. Step 3: Cross multiply
    216.42x = 552.45 × 552.45
  4. Step 4: Simplify right side
    216.42x = 305,195.82
  5. Step 5: Solve for x
    x = 305,195.82/216.42
  6. Step 6: Final answer
    x = 1,410.19

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Why These Related Problems?

These problems maintain the same ratio (2.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.