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Finding the Fourth Proportional to 191.70, 264.66 and 126.31

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Solution

The fourth proportional to 191.70, 264.66 and 126.31 is: 174.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.70 : 264.66 = 126.31 : x
  2. Step 2: Convert to fraction form
    191.70/264.66 = 126.31/x
  3. Step 3: Cross multiply
    191.70x = 264.66 × 126.31
  4. Step 4: Simplify right side
    191.70x = 33,429.20
  5. Step 5: Solve for x
    x = 33,429.20/191.70
  6. Step 6: Final answer
    x = 174.38

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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.