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Finding the Third Proportional to 288.56 and 437.91

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Solution

The third proportional to 288.56 and 437.91 is: 664.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.56 : 437.91 = 437.91 : x
  2. Step 2: Convert to fraction form
    288.56/437.91 = 437.91/x
  3. Step 3: Cross multiply
    288.56x = 437.91 × 437.91
  4. Step 4: Simplify right side
    288.56x = 191,761.88
  5. Step 5: Solve for x
    x = 191,761.88/288.56
  6. Step 6: Final answer
    x = 664.54

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.