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Finding the Third Proportional to 974 and 2,389

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Solution

The third proportional to 974 and 2,389 is: 5,859.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    974 : 2,389 = 2,389 : x
  2. Step 2: Convert to fraction form
    974/2,389 = 2,389/x
  3. Step 3: Cross multiply
    974x = 2,389 × 2,389
  4. Step 4: Simplify right side
    974x = 5,707,321
  5. Step 5: Solve for x
    x = 5,707,321/974
  6. Step 6: Final answer
    x = 5,859.67

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Why These Related Problems?

These problems maintain the same ratio (2.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.