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Finding the Third Proportional to 2,391 and 3,620

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Solution

The third proportional to 2,391 and 3,620 is: 5,480.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391 : 3,620 = 3,620 : x
  2. Step 2: Convert to fraction form
    2,391/3,620 = 3,620/x
  3. Step 3: Cross multiply
    2,391x = 3,620 × 3,620
  4. Step 4: Simplify right side
    2,391x = 13,104,400
  5. Step 5: Solve for x
    x = 13,104,400/2,391
  6. Step 6: Final answer
    x = 5,480.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.