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Finding the Third Proportional to 942 and 1,144

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Solution

The third proportional to 942 and 1,144 is: 1,389.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    942 : 1,144 = 1,144 : x
  2. Step 2: Convert to fraction form
    942/1,144 = 1,144/x
  3. Step 3: Cross multiply
    942x = 1,144 × 1,144
  4. Step 4: Simplify right side
    942x = 1,308,736
  5. Step 5: Solve for x
    x = 1,308,736/942
  6. Step 6: Final answer
    x = 1,389.32

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Why These Related Problems?

These problems maintain the same ratio (1.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.