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Finding the Third Proportional to 939 and 1,492

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Solution

The third proportional to 939 and 1,492 is: 2,370.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    939 : 1,492 = 1,492 : x
  2. Step 2: Convert to fraction form
    939/1,492 = 1,492/x
  3. Step 3: Cross multiply
    939x = 1,492 × 1,492
  4. Step 4: Simplify right side
    939x = 2,226,064
  5. Step 5: Solve for x
    x = 2,226,064/939
  6. Step 6: Final answer
    x = 2,370.68

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.