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Finding the Fourth Proportional to 199.36, 298.80 and 71.04

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Solution

The fourth proportional to 199.36, 298.80 and 71.04 is: 106.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.36 : 298.80 = 71.04 : x
  2. Step 2: Convert to fraction form
    199.36/298.80 = 71.04/x
  3. Step 3: Cross multiply
    199.36x = 298.80 × 71.04
  4. Step 4: Simplify right side
    199.36x = 21,226.75
  5. Step 5: Solve for x
    x = 21,226.75/199.36
  6. Step 6: Final answer
    x = 106.47

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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.