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Finding the Third Proportional to 2,990 and 4,565

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Solution

The third proportional to 2,990 and 4,565 is: 6,969.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990 : 4,565 = 4,565 : x
  2. Step 2: Convert to fraction form
    2,990/4,565 = 4,565/x
  3. Step 3: Cross multiply
    2,990x = 4,565 × 4,565
  4. Step 4: Simplify right side
    2,990x = 20,839,225
  5. Step 5: Solve for x
    x = 20,839,225/2,990
  6. Step 6: Final answer
    x = 6,969.64

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.