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Finding the Third Proportional to 187.75 and 399.63

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Solution

The third proportional to 187.75 and 399.63 is: 850.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.75 : 399.63 = 399.63 : x
  2. Step 2: Convert to fraction form
    187.75/399.63 = 399.63/x
  3. Step 3: Cross multiply
    187.75x = 399.63 × 399.63
  4. Step 4: Simplify right side
    187.75x = 159,700.14
  5. Step 5: Solve for x
    x = 159,700.14/187.75
  6. Step 6: Final answer
    x = 850.60

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.