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Finding the Fourth Proportional to 187.19, 280.38 and 154.32

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Solution

The fourth proportional to 187.19, 280.38 and 154.32 is: 231.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    187.19 : 280.38 = 154.32 : x
  2. Step 2: Convert to fraction form
    187.19/280.38 = 154.32/x
  3. Step 3: Cross multiply
    187.19x = 280.38 × 154.32
  4. Step 4: Simplify right side
    187.19x = 43,269.62
  5. Step 5: Solve for x
    x = 43,269.62/187.19
  6. Step 6: Final answer
    x = 231.15

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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.