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Finding the Third Proportional to 1,345.78 and 2,160.84

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Solution

The third proportional to 1,345.78 and 2,160.84 is: 3,469.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.78 : 2,160.84 = 2,160.84 : x
  2. Step 2: Convert to fraction form
    1,345.78/2,160.84 = 2,160.84/x
  3. Step 3: Cross multiply
    1,345.78x = 2,160.84 × 2,160.84
  4. Step 4: Simplify right side
    1,345.78x = 4,669,245.71
  5. Step 5: Solve for x
    x = 4,669,245.71/1,345.78
  6. Step 6: Final answer
    x = 3,469.54

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.