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Finding the Fourth Proportional to 191.10, 286.23 and 156.78

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Solution

The fourth proportional to 191.10, 286.23 and 156.78 is: 234.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.10 : 286.23 = 156.78 : x
  2. Step 2: Convert to fraction form
    191.10/286.23 = 156.78/x
  3. Step 3: Cross multiply
    191.10x = 286.23 × 156.78
  4. Step 4: Simplify right side
    191.10x = 44,875.14
  5. Step 5: Solve for x
    x = 44,875.14/191.10
  6. Step 6: Final answer
    x = 234.83

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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.