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Finding the Third Proportional to 214.88 and 431.44

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Solution

The third proportional to 214.88 and 431.44 is: 866.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.88 : 431.44 = 431.44 : x
  2. Step 2: Convert to fraction form
    214.88/431.44 = 431.44/x
  3. Step 3: Cross multiply
    214.88x = 431.44 × 431.44
  4. Step 4: Simplify right side
    214.88x = 186,138.32
  5. Step 5: Solve for x
    x = 186,138.32/214.88
  6. Step 6: Final answer
    x = 866.26

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Why These Related Problems?

These problems maintain the same ratio (2.01) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.