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Finding the Third Proportional to 255.66 and 394.03

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Solution

The third proportional to 255.66 and 394.03 is: 607.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.66 : 394.03 = 394.03 : x
  2. Step 2: Convert to fraction form
    255.66/394.03 = 394.03/x
  3. Step 3: Cross multiply
    255.66x = 394.03 × 394.03
  4. Step 4: Simplify right side
    255.66x = 155,260.63
  5. Step 5: Solve for x
    x = 155,260.63/255.66
  6. Step 6: Final answer
    x = 607.30

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.