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Finding the Third Proportional to 4,791 and 7,190

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Solution

The third proportional to 4,791 and 7,190 is: 10,790.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,791 : 7,190 = 7,190 : x
  2. Step 2: Convert to fraction form
    4,791/7,190 = 7,190/x
  3. Step 3: Cross multiply
    4,791x = 7,190 × 7,190
  4. Step 4: Simplify right side
    4,791x = 51,696,100
  5. Step 5: Solve for x
    x = 51,696,100/4,791
  6. Step 6: Final answer
    x = 10,790.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.