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Finding the Third Proportional to 187.88 and 290.81

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Solution

The third proportional to 187.88 and 290.81 is: 450.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.88 : 290.81 = 290.81 : x
  2. Step 2: Convert to fraction form
    187.88/290.81 = 290.81/x
  3. Step 3: Cross multiply
    187.88x = 290.81 × 290.81
  4. Step 4: Simplify right side
    187.88x = 84,571.91
  5. Step 5: Solve for x
    x = 84,571.91/187.88
  6. Step 6: Final answer
    x = 450.15

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.