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Finding the Third Proportional to 253.88 and 340.31

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Solution

The third proportional to 253.88 and 340.31 is: 456.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.88 : 340.31 = 340.31 : x
  2. Step 2: Convert to fraction form
    253.88/340.31 = 340.31/x
  3. Step 3: Cross multiply
    253.88x = 340.31 × 340.31
  4. Step 4: Simplify right side
    253.88x = 115,812.60
  5. Step 5: Solve for x
    x = 115,812.60/253.88
  6. Step 6: Final answer
    x = 456.18

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.