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Finding the Fourth Proportional to 199.59, 298.99 and 130.90

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Solution

The fourth proportional to 199.59, 298.99 and 130.90 is: 196.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.59 : 298.99 = 130.90 : x
  2. Step 2: Convert to fraction form
    199.59/298.99 = 130.90/x
  3. Step 3: Cross multiply
    199.59x = 298.99 × 130.90
  4. Step 4: Simplify right side
    199.59x = 39,138.98
  5. Step 5: Solve for x
    x = 39,138.98/199.59
  6. Step 6: Final answer
    x = 196.10

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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.