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Finding the Third Proportional to 3,108.75 and 4,678.13

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Solution

The third proportional to 3,108.75 and 4,678.13 is: 7,039.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.75 : 4,678.13 = 4,678.13 : x
  2. Step 2: Convert to fraction form
    3,108.75/4,678.13 = 4,678.13/x
  3. Step 3: Cross multiply
    3,108.75x = 4,678.13 × 4,678.13
  4. Step 4: Simplify right side
    3,108.75x = 21,884,853.52
  5. Step 5: Solve for x
    x = 21,884,853.52/3,108.75
  6. Step 6: Final answer
    x = 7,039.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.