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Finding the Fourth Proportional to 199.20, 299.48 and 159.06

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Solution

The fourth proportional to 199.20, 299.48 and 159.06 is: 239.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.20 : 299.48 = 159.06 : x
  2. Step 2: Convert to fraction form
    199.20/299.48 = 159.06/x
  3. Step 3: Cross multiply
    199.20x = 299.48 × 159.06
  4. Step 4: Simplify right side
    199.20x = 47,634.49
  5. Step 5: Solve for x
    x = 47,634.49/199.20
  6. Step 6: Final answer
    x = 239.13

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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.