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Finding the Fourth Proportional to 591.85, 816.83 and 355.81

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Solution

The fourth proportional to 591.85, 816.83 and 355.81 is: 491.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.85 : 816.83 = 355.81 : x
  2. Step 2: Convert to fraction form
    591.85/816.83 = 355.81/x
  3. Step 3: Cross multiply
    591.85x = 816.83 × 355.81
  4. Step 4: Simplify right side
    591.85x = 290,634.66
  5. Step 5: Solve for x
    x = 290,634.66/591.85
  6. Step 6: Final answer
    x = 491.06

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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.