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Finding the Fourth Proportional to 191.10, 263.92 and 158.58

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Solution

The fourth proportional to 191.10, 263.92 and 158.58 is: 219.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.10 : 263.92 = 158.58 : x
  2. Step 2: Convert to fraction form
    191.10/263.92 = 158.58/x
  3. Step 3: Cross multiply
    191.10x = 263.92 × 158.58
  4. Step 4: Simplify right side
    191.10x = 41,852.43
  5. Step 5: Solve for x
    x = 41,852.43/191.10
  6. Step 6: Final answer
    x = 219.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.