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Finding the Third Proportional to 145.31 and 218.44

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Solution

The third proportional to 145.31 and 218.44 is: 328.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.31 : 218.44 = 218.44 : x
  2. Step 2: Convert to fraction form
    145.31/218.44 = 218.44/x
  3. Step 3: Cross multiply
    145.31x = 218.44 × 218.44
  4. Step 4: Simplify right side
    145.31x = 47,714.94
  5. Step 5: Solve for x
    x = 47,714.94/145.31
  6. Step 6: Final answer
    x = 328.36

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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.