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Finding the Fourth Proportional to 604.78, 834.90 and 395.26

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Solution

The fourth proportional to 604.78, 834.90 and 395.26 is: 545.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.78 : 834.90 = 395.26 : x
  2. Step 2: Convert to fraction form
    604.78/834.90 = 395.26/x
  3. Step 3: Cross multiply
    604.78x = 834.90 × 395.26
  4. Step 4: Simplify right side
    604.78x = 330,002.57
  5. Step 5: Solve for x
    x = 330,002.57/604.78
  6. Step 6: Final answer
    x = 545.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.