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Finding the Fourth Proportional to 604.50, 834.38 and 395.21

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Solution

The fourth proportional to 604.50, 834.38 and 395.21 is: 545.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.50 : 834.38 = 395.21 : x
  2. Step 2: Convert to fraction form
    604.50/834.38 = 395.21/x
  3. Step 3: Cross multiply
    604.50x = 834.38 × 395.21
  4. Step 4: Simplify right side
    604.50x = 329,749.17
  5. Step 5: Solve for x
    x = 329,749.17/604.50
  6. Step 6: Final answer
    x = 545.49

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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.