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Finding the Third Proportional to 508.78 and 1,108.69

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Solution

The third proportional to 508.78 and 1,108.69 is: 2,415.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.78 : 1,108.69 = 1,108.69 : x
  2. Step 2: Convert to fraction form
    508.78/1,108.69 = 1,108.69/x
  3. Step 3: Cross multiply
    508.78x = 1,108.69 × 1,108.69
  4. Step 4: Simplify right side
    508.78x = 1,229,187.97
  5. Step 5: Solve for x
    x = 1,229,187.97/508.78
  6. Step 6: Final answer
    x = 2,415.95

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.