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Finding the Third Proportional to 155.25 and 320.34

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Solution

The third proportional to 155.25 and 320.34 is: 661.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.25 : 320.34 = 320.34 : x
  2. Step 2: Convert to fraction form
    155.25/320.34 = 320.34/x
  3. Step 3: Cross multiply
    155.25x = 320.34 × 320.34
  4. Step 4: Simplify right side
    155.25x = 102,620.12
  5. Step 5: Solve for x
    x = 102,620.12/155.25
  6. Step 6: Final answer
    x = 661.00

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.