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Finding the Third Proportional to 260.56 and 380.16

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Solution

The third proportional to 260.56 and 380.16 is: 554.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.56 : 380.16 = 380.16 : x
  2. Step 2: Convert to fraction form
    260.56/380.16 = 380.16/x
  3. Step 3: Cross multiply
    260.56x = 380.16 × 380.16
  4. Step 4: Simplify right side
    260.56x = 144,523.23
  5. Step 5: Solve for x
    x = 144,523.23/260.56
  6. Step 6: Final answer
    x = 554.66

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.