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Finding the Third Proportional to 272.06 and 432.56

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Solution

The third proportional to 272.06 and 432.56 is: 687.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    272.06 : 432.56 = 432.56 : x
  2. Step 2: Convert to fraction form
    272.06/432.56 = 432.56/x
  3. Step 3: Cross multiply
    272.06x = 432.56 × 432.56
  4. Step 4: Simplify right side
    272.06x = 187,110.32
  5. Step 5: Solve for x
    x = 187,110.32/272.06
  6. Step 6: Final answer
    x = 687.75

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.