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Finding the Third Proportional to 724 and 1,008

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Solution

The third proportional to 724 and 1,008 is: 1,403.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    724 : 1,008 = 1,008 : x
  2. Step 2: Convert to fraction form
    724/1,008 = 1,008/x
  3. Step 3: Cross multiply
    724x = 1,008 × 1,008
  4. Step 4: Simplify right side
    724x = 1,016,064
  5. Step 5: Solve for x
    x = 1,016,064/724
  6. Step 6: Final answer
    x = 1,403.40

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.