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Finding the Third Proportional to 3,315 and 4,891.50

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Solution

The third proportional to 3,315 and 4,891.50 is: 7,217.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,315 : 4,891.50 = 4,891.50 : x
  2. Step 2: Convert to fraction form
    3,315/4,891.50 = 4,891.50/x
  3. Step 3: Cross multiply
    3,315x = 4,891.50 × 4,891.50
  4. Step 4: Simplify right side
    3,315x = 23,926,772.25
  5. Step 5: Solve for x
    x = 23,926,772.25/3,315
  6. Step 6: Final answer
    x = 7,217.73

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.