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Finding the Third Proportional to 398.67 and 968.20

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Solution

The third proportional to 398.67 and 968.20 is: 2,351.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.67 : 968.20 = 968.20 : x
  2. Step 2: Convert to fraction form
    398.67/968.20 = 968.20/x
  3. Step 3: Cross multiply
    398.67x = 968.20 × 968.20
  4. Step 4: Simplify right side
    398.67x = 937,417.29
  5. Step 5: Solve for x
    x = 937,417.29/398.67
  6. Step 6: Final answer
    x = 2,351.35

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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.