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Finding the Fourth Proportional to 591.37, 816.39 and 395.91

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Solution

The fourth proportional to 591.37, 816.39 and 395.91 is: 546.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.37 : 816.39 = 395.91 : x
  2. Step 2: Convert to fraction form
    591.37/816.39 = 395.91/x
  3. Step 3: Cross multiply
    591.37x = 816.39 × 395.91
  4. Step 4: Simplify right side
    591.37x = 323,216.96
  5. Step 5: Solve for x
    x = 323,216.96/591.37
  6. Step 6: Final answer
    x = 546.56

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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.