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Finding the Third Proportional to 243 and 372.09

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Solution

The third proportional to 243 and 372.09 is: 569.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    243 : 372.09 = 372.09 : x
  2. Step 2: Convert to fraction form
    243/372.09 = 372.09/x
  3. Step 3: Cross multiply
    243x = 372.09 × 372.09
  4. Step 4: Simplify right side
    243x = 138,453.76
  5. Step 5: Solve for x
    x = 138,453.76/243
  6. Step 6: Final answer
    x = 569.77

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.