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Finding the Third Proportional to 291.38 and 437.63

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Solution

The third proportional to 291.38 and 437.63 is: 657.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.38 : 437.63 = 437.63 : x
  2. Step 2: Convert to fraction form
    291.38/437.63 = 437.63/x
  3. Step 3: Cross multiply
    291.38x = 437.63 × 437.63
  4. Step 4: Simplify right side
    291.38x = 191,515.64
  5. Step 5: Solve for x
    x = 191,515.64/291.38
  6. Step 6: Final answer
    x = 657.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.