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Finding the Fourth Proportional to 191.43, 263.97 and 156.51

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Solution

The fourth proportional to 191.43, 263.97 and 156.51 is: 215.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.43 : 263.97 = 156.51 : x
  2. Step 2: Convert to fraction form
    191.43/263.97 = 156.51/x
  3. Step 3: Cross multiply
    191.43x = 263.97 × 156.51
  4. Step 4: Simplify right side
    191.43x = 41,313.94
  5. Step 5: Solve for x
    x = 41,313.94/191.43
  6. Step 6: Final answer
    x = 215.82

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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.