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Finding the Third Proportional to 3,315.75 and 6,718.50

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Solution

The third proportional to 3,315.75 and 6,718.50 is: 13,613.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315.75 : 6,718.50 = 6,718.50 : x
  2. Step 2: Convert to fraction form
    3,315.75/6,718.50 = 6,718.50/x
  3. Step 3: Cross multiply
    3,315.75x = 6,718.50 × 6,718.50
  4. Step 4: Simplify right side
    3,315.75x = 45,138,242.25
  5. Step 5: Solve for x
    x = 45,138,242.25/3,315.75
  6. Step 6: Final answer
    x = 13,613.28

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.