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Finding the Fourth Proportional to 591.44, 815.40 and 394.61

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Solution

The fourth proportional to 591.44, 815.40 and 394.61 is: 544.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.44 : 815.40 = 394.61 : x
  2. Step 2: Convert to fraction form
    591.44/815.40 = 394.61/x
  3. Step 3: Cross multiply
    591.44x = 815.40 × 394.61
  4. Step 4: Simplify right side
    591.44x = 321,760.92
  5. Step 5: Solve for x
    x = 321,760.92/591.44
  6. Step 6: Final answer
    x = 544.03

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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.