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Finding the Third Proportional to 202.90 and 313.42

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Solution

The third proportional to 202.90 and 313.42 is: 484.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.90 : 313.42 = 313.42 : x
  2. Step 2: Convert to fraction form
    202.90/313.42 = 313.42/x
  3. Step 3: Cross multiply
    202.90x = 313.42 × 313.42
  4. Step 4: Simplify right side
    202.90x = 98,232.20
  5. Step 5: Solve for x
    x = 98,232.20/202.90
  6. Step 6: Final answer
    x = 484.15

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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.