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Finding the Third Proportional to 748 and 1,153

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Solution

The third proportional to 748 and 1,153 is: 1,777.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    748 : 1,153 = 1,153 : x
  2. Step 2: Convert to fraction form
    748/1,153 = 1,153/x
  3. Step 3: Cross multiply
    748x = 1,153 × 1,153
  4. Step 4: Simplify right side
    748x = 1,329,409
  5. Step 5: Solve for x
    x = 1,329,409/748
  6. Step 6: Final answer
    x = 1,777.28

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.