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Finding the Fourth Proportional to 584.55, 806.81 and 398.49

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Solution

The fourth proportional to 584.55, 806.81 and 398.49 is: 550.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    584.55 : 806.81 = 398.49 : x
  2. Step 2: Convert to fraction form
    584.55/806.81 = 398.49/x
  3. Step 3: Cross multiply
    584.55x = 806.81 × 398.49
  4. Step 4: Simplify right side
    584.55x = 321,505.72
  5. Step 5: Solve for x
    x = 321,505.72/584.55
  6. Step 6: Final answer
    x = 550.01

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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.