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Finding the Fourth Proportional to 472.83, 708.94 and 198.78

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Solution

The fourth proportional to 472.83, 708.94 and 198.78 is: 298.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.83 : 708.94 = 198.78 : x
  2. Step 2: Convert to fraction form
    472.83/708.94 = 198.78/x
  3. Step 3: Cross multiply
    472.83x = 708.94 × 198.78
  4. Step 4: Simplify right side
    472.83x = 140,918.55
  5. Step 5: Solve for x
    x = 140,918.55/472.83
  6. Step 6: Final answer
    x = 298.04

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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.