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Finding the Fourth Proportional to 217.99, 300.86 and 140.59

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Solution

The fourth proportional to 217.99, 300.86 and 140.59 is: 194.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.99 : 300.86 = 140.59 : x
  2. Step 2: Convert to fraction form
    217.99/300.86 = 140.59/x
  3. Step 3: Cross multiply
    217.99x = 300.86 × 140.59
  4. Step 4: Simplify right side
    217.99x = 42,297.20
  5. Step 5: Solve for x
    x = 42,297.20/217.99
  6. Step 6: Final answer
    x = 194.03

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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.