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Finding the Third Proportional to 155.81 and 336.09

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Solution

The third proportional to 155.81 and 336.09 is: 724.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.81 : 336.09 = 336.09 : x
  2. Step 2: Convert to fraction form
    155.81/336.09 = 336.09/x
  3. Step 3: Cross multiply
    155.81x = 336.09 × 336.09
  4. Step 4: Simplify right side
    155.81x = 112,959.01
  5. Step 5: Solve for x
    x = 112,959.01/155.81
  6. Step 6: Final answer
    x = 724.97

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.