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Finding the Fourth Proportional to 604.38, 906.61 and 193.78

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Solution

The fourth proportional to 604.38, 906.61 and 193.78 is: 290.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.38 : 906.61 = 193.78 : x
  2. Step 2: Convert to fraction form
    604.38/906.61 = 193.78/x
  3. Step 3: Cross multiply
    604.38x = 906.61 × 193.78
  4. Step 4: Simplify right side
    604.38x = 175,682.89
  5. Step 5: Solve for x
    x = 175,682.89/604.38
  6. Step 6: Final answer
    x = 290.68

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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.