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Finding the Fourth Proportional to 604.86, 834.14 and 394.80

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Solution

The fourth proportional to 604.86, 834.14 and 394.80 is: 544.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    604.86 : 834.14 = 394.80 : x
  2. Step 2: Convert to fraction form
    604.86/834.14 = 394.80/x
  3. Step 3: Cross multiply
    604.86x = 834.14 × 394.80
  4. Step 4: Simplify right side
    604.86x = 329,318.47
  5. Step 5: Solve for x
    x = 329,318.47/604.86
  6. Step 6: Final answer
    x = 544.45

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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.