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Finding the Fourth Proportional to 187.15, 280.51 and 141.35

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Solution

The fourth proportional to 187.15, 280.51 and 141.35 is: 211.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.15 : 280.51 = 141.35 : x
  2. Step 2: Convert to fraction form
    187.15/280.51 = 141.35/x
  3. Step 3: Cross multiply
    187.15x = 280.51 × 141.35
  4. Step 4: Simplify right side
    187.15x = 39,650.09
  5. Step 5: Solve for x
    x = 39,650.09/187.15
  6. Step 6: Final answer
    x = 211.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.