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Finding the Third Proportional to 1,215.84 and 2,818.55

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Solution

The third proportional to 1,215.84 and 2,818.55 is: 6,533.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.84 : 2,818.55 = 2,818.55 : x
  2. Step 2: Convert to fraction form
    1,215.84/2,818.55 = 2,818.55/x
  3. Step 3: Cross multiply
    1,215.84x = 2,818.55 × 2,818.55
  4. Step 4: Simplify right side
    1,215.84x = 7,944,206.49
  5. Step 5: Solve for x
    x = 7,944,206.49/1,215.84
  6. Step 6: Final answer
    x = 6,533.90

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Why These Related Problems?

These problems maintain the same ratio (2.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.