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Finding the Fourth Proportional to 404.34, 606.75 and 198.93

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Solution

The fourth proportional to 404.34, 606.75 and 198.93 is: 298.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.34 : 606.75 = 198.93 : x
  2. Step 2: Convert to fraction form
    404.34/606.75 = 198.93/x
  3. Step 3: Cross multiply
    404.34x = 606.75 × 198.93
  4. Step 4: Simplify right side
    404.34x = 120,700.78
  5. Step 5: Solve for x
    x = 120,700.78/404.34
  6. Step 6: Final answer
    x = 298.51

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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.