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Finding the Fourth Proportional to 336.15, 503.55 and 198.79

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Solution

The fourth proportional to 336.15, 503.55 and 198.79 is: 297.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    336.15 : 503.55 = 198.79 : x
  2. Step 2: Convert to fraction form
    336.15/503.55 = 198.79/x
  3. Step 3: Cross multiply
    336.15x = 503.55 × 198.79
  4. Step 4: Simplify right side
    336.15x = 100,099.45
  5. Step 5: Solve for x
    x = 100,099.45/336.15
  6. Step 6: Final answer
    x = 297.78

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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.