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Finding the Fourth Proportional to 191.01, 263.45 and 143.87

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Solution

The fourth proportional to 191.01, 263.45 and 143.87 is: 198.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.01 : 263.45 = 143.87 : x
  2. Step 2: Convert to fraction form
    191.01/263.45 = 143.87/x
  3. Step 3: Cross multiply
    191.01x = 263.45 × 143.87
  4. Step 4: Simplify right side
    191.01x = 37,900.51
  5. Step 5: Solve for x
    x = 37,900.51/191.01
  6. Step 6: Final answer
    x = 198.42

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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.