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Finding the Fourth Proportional to 191.08, 285.45 and 187.84

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Solution

The fourth proportional to 191.08, 285.45 and 187.84 is: 280.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.08 : 285.45 = 187.84 : x
  2. Step 2: Convert to fraction form
    191.08/285.45 = 187.84/x
  3. Step 3: Cross multiply
    191.08x = 285.45 × 187.84
  4. Step 4: Simplify right side
    191.08x = 53,618.93
  5. Step 5: Solve for x
    x = 53,618.93/191.08
  6. Step 6: Final answer
    x = 280.61

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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.