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Finding the Third Proportional to 448.31 and 716.91

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Solution

The third proportional to 448.31 and 716.91 is: 1,146.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.31 : 716.91 = 716.91 : x
  2. Step 2: Convert to fraction form
    448.31/716.91 = 716.91/x
  3. Step 3: Cross multiply
    448.31x = 716.91 × 716.91
  4. Step 4: Simplify right side
    448.31x = 513,954.57
  5. Step 5: Solve for x
    x = 513,954.57/448.31
  6. Step 6: Final answer
    x = 1,146.42

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.