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Finding the Third Proportional to 90 and 185.81

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Solution

The third proportional to 90 and 185.81 is: 383.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    90 : 185.81 = 185.81 : x
  2. Step 2: Convert to fraction form
    90/185.81 = 185.81/x
  3. Step 3: Cross multiply
    90x = 185.81 × 185.81
  4. Step 4: Simplify right side
    90x = 34,526.29
  5. Step 5: Solve for x
    x = 34,526.29/90
  6. Step 6: Final answer
    x = 383.63

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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.