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Finding the Fourth Proportional to 187.86, 280.43 and 163.56

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Solution

The fourth proportional to 187.86, 280.43 and 163.56 is: 244.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.86 : 280.43 = 163.56 : x
  2. Step 2: Convert to fraction form
    187.86/280.43 = 163.56/x
  3. Step 3: Cross multiply
    187.86x = 280.43 × 163.56
  4. Step 4: Simplify right side
    187.86x = 45,866.31
  5. Step 5: Solve for x
    x = 45,866.31/187.86
  6. Step 6: Final answer
    x = 244.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.