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Finding the Fourth Proportional to 191.82, 286.67 and 140.57

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Solution

The fourth proportional to 191.82, 286.67 and 140.57 is: 210.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.82 : 286.67 = 140.57 : x
  2. Step 2: Convert to fraction form
    191.82/286.67 = 140.57/x
  3. Step 3: Cross multiply
    191.82x = 286.67 × 140.57
  4. Step 4: Simplify right side
    191.82x = 40,297.20
  5. Step 5: Solve for x
    x = 40,297.20/191.82
  6. Step 6: Final answer
    x = 210.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.