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Finding the Third Proportional to 201.56 and 310.22

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Solution

The third proportional to 201.56 and 310.22 is: 477.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.56 : 310.22 = 310.22 : x
  2. Step 2: Convert to fraction form
    201.56/310.22 = 310.22/x
  3. Step 3: Cross multiply
    201.56x = 310.22 × 310.22
  4. Step 4: Simplify right side
    201.56x = 96,235.67
  5. Step 5: Solve for x
    x = 96,235.67/201.56
  6. Step 6: Final answer
    x = 477.45

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.