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Finding the Fourth Proportional to 199.23, 298.72 and 90.88

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Solution

The fourth proportional to 199.23, 298.72 and 90.88 is: 136.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.23 : 298.72 = 90.88 : x
  2. Step 2: Convert to fraction form
    199.23/298.72 = 90.88/x
  3. Step 3: Cross multiply
    199.23x = 298.72 × 90.88
  4. Step 4: Simplify right side
    199.23x = 27,147.67
  5. Step 5: Solve for x
    x = 27,147.67/199.23
  6. Step 6: Final answer
    x = 136.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.