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Finding the Third Proportional to 398.25 and 875.81

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Solution

The third proportional to 398.25 and 875.81 is: 1,926.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.25 : 875.81 = 875.81 : x
  2. Step 2: Convert to fraction form
    398.25/875.81 = 875.81/x
  3. Step 3: Cross multiply
    398.25x = 875.81 × 875.81
  4. Step 4: Simplify right side
    398.25x = 767,047.54
  5. Step 5: Solve for x
    x = 767,047.54/398.25
  6. Step 6: Final answer
    x = 1,926.05

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These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.