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Finding the Third Proportional to 486.25 and 744.63

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Solution

The third proportional to 486.25 and 744.63 is: 1,140.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.25 : 744.63 = 744.63 : x
  2. Step 2: Convert to fraction form
    486.25/744.63 = 744.63/x
  3. Step 3: Cross multiply
    486.25x = 744.63 × 744.63
  4. Step 4: Simplify right side
    486.25x = 554,466.39
  5. Step 5: Solve for x
    x = 554,466.39/486.25
  6. Step 6: Final answer
    x = 1,140.29

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.