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Finding the Third Proportional to 191.06 and 278.91

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Solution

The third proportional to 191.06 and 278.91 is: 407.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.06 : 278.91 = 278.91 : x
  2. Step 2: Convert to fraction form
    191.06/278.91 = 278.91/x
  3. Step 3: Cross multiply
    191.06x = 278.91 × 278.91
  4. Step 4: Simplify right side
    191.06x = 77,788.70
  5. Step 5: Solve for x
    x = 77,788.70/191.06
  6. Step 6: Final answer
    x = 407.14

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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.