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Finding the Third Proportional to 4,922 and 7,791

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Solution

The third proportional to 4,922 and 7,791 is: 12,332.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,922 : 7,791 = 7,791 : x
  2. Step 2: Convert to fraction form
    4,922/7,791 = 7,791/x
  3. Step 3: Cross multiply
    4,922x = 7,791 × 7,791
  4. Step 4: Simplify right side
    4,922x = 60,699,681
  5. Step 5: Solve for x
    x = 60,699,681/4,922
  6. Step 6: Final answer
    x = 12,332.32

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.