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Finding the Third Proportional to 942 and 1,224

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Solution

The third proportional to 942 and 1,224 is: 1,590.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    942 : 1,224 = 1,224 : x
  2. Step 2: Convert to fraction form
    942/1,224 = 1,224/x
  3. Step 3: Cross multiply
    942x = 1,224 × 1,224
  4. Step 4: Simplify right side
    942x = 1,498,176
  5. Step 5: Solve for x
    x = 1,498,176/942
  6. Step 6: Final answer
    x = 1,590.42

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.