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Finding the Fourth Proportional to 573.39, 791.51 and 398.84

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Solution

The fourth proportional to 573.39, 791.51 and 398.84 is: 550.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.39 : 791.51 = 398.84 : x
  2. Step 2: Convert to fraction form
    573.39/791.51 = 398.84/x
  3. Step 3: Cross multiply
    573.39x = 791.51 × 398.84
  4. Step 4: Simplify right side
    573.39x = 315,679.90
  5. Step 5: Solve for x
    x = 315,679.90/573.39
  6. Step 6: Final answer
    x = 550.55

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