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Finding the Third Proportional to 15.78 and 30.44

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Solution

The third proportional to 15.78 and 30.44 is: 58.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.78 : 30.44 = 30.44 : x
  2. Step 2: Convert to fraction form
    15.78/30.44 = 30.44/x
  3. Step 3: Cross multiply
    15.78x = 30.44 × 30.44
  4. Step 4: Simplify right side
    15.78x = 926.50
  5. Step 5: Solve for x
    x = 926.50/15.78
  6. Step 6: Final answer
    x = 58.70

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Why These Related Problems?

These problems maintain the same ratio (1.93) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.