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Finding the Fourth Proportional to 263.04, 394.40 and 198.88

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Solution

The fourth proportional to 263.04, 394.40 and 198.88 is: 298.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.04 : 394.40 = 198.88 : x
  2. Step 2: Convert to fraction form
    263.04/394.40 = 198.88/x
  3. Step 3: Cross multiply
    263.04x = 394.40 × 198.88
  4. Step 4: Simplify right side
    263.04x = 78,438.27
  5. Step 5: Solve for x
    x = 78,438.27/263.04
  6. Step 6: Final answer
    x = 298.20

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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.