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Finding the Third Proportional to 2,215 and 3,439.50

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Solution

The third proportional to 2,215 and 3,439.50 is: 5,340.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215 : 3,439.50 = 3,439.50 : x
  2. Step 2: Convert to fraction form
    2,215/3,439.50 = 3,439.50/x
  3. Step 3: Cross multiply
    2,215x = 3,439.50 × 3,439.50
  4. Step 4: Simplify right side
    2,215x = 11,830,160.25
  5. Step 5: Solve for x
    x = 11,830,160.25/2,215
  6. Step 6: Final answer
    x = 5,340.93

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.