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Finding the Fourth Proportional to 591.26, 815.87 and 394.83

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Solution

The fourth proportional to 591.26, 815.87 and 394.83 is: 544.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.26 : 815.87 = 394.83 : x
  2. Step 2: Convert to fraction form
    591.26/815.87 = 394.83/x
  3. Step 3: Cross multiply
    591.26x = 815.87 × 394.83
  4. Step 4: Simplify right side
    591.26x = 322,130.94
  5. Step 5: Solve for x
    x = 322,130.94/591.26
  6. Step 6: Final answer
    x = 544.83

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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.