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Finding the Third Proportional to 7.88 and 18.35

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Solution

The third proportional to 7.88 and 18.35 is: 42.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.88 : 18.35 = 18.35 : x
  2. Step 2: Convert to fraction form
    7.88/18.35 = 18.35/x
  3. Step 3: Cross multiply
    7.88x = 18.35 × 18.35
  4. Step 4: Simplify right side
    7.88x = 336.78
  5. Step 5: Solve for x
    x = 336.78/7.88
  6. Step 6: Final answer
    x = 42.77

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Why These Related Problems?

These problems maintain the same ratio (2.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.