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Finding the Third Proportional to 191.74 and 258.05

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Solution

The third proportional to 191.74 and 258.05 is: 347.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.74 : 258.05 = 258.05 : x
  2. Step 2: Convert to fraction form
    191.74/258.05 = 258.05/x
  3. Step 3: Cross multiply
    191.74x = 258.05 × 258.05
  4. Step 4: Simplify right side
    191.74x = 66,588.19
  5. Step 5: Solve for x
    x = 66,588.19/191.74
  6. Step 6: Final answer
    x = 347.28

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.