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Finding the Fourth Proportional to 472.21, 708.61 and 198.53

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Solution

The fourth proportional to 472.21, 708.61 and 198.53 is: 297.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.21 : 708.61 = 198.53 : x
  2. Step 2: Convert to fraction form
    472.21/708.61 = 198.53/x
  3. Step 3: Cross multiply
    472.21x = 708.61 × 198.53
  4. Step 4: Simplify right side
    472.21x = 140,680.34
  5. Step 5: Solve for x
    x = 140,680.34/472.21
  6. Step 6: Final answer
    x = 297.92

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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.