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Finding the Third Proportional to 267.94 and 429.28

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Solution

The third proportional to 267.94 and 429.28 is: 687.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.94 : 429.28 = 429.28 : x
  2. Step 2: Convert to fraction form
    267.94/429.28 = 429.28/x
  3. Step 3: Cross multiply
    267.94x = 429.28 × 429.28
  4. Step 4: Simplify right side
    267.94x = 184,282.39
  5. Step 5: Solve for x
    x = 184,282.39/267.94
  6. Step 6: Final answer
    x = 687.78

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.