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Finding the Fourth Proportional to 591.85, 816.72 and 355.84

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Solution

The fourth proportional to 591.85, 816.72 and 355.84 is: 491.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.85 : 816.72 = 355.84 : x
  2. Step 2: Convert to fraction form
    591.85/816.72 = 355.84/x
  3. Step 3: Cross multiply
    591.85x = 816.72 × 355.84
  4. Step 4: Simplify right side
    591.85x = 290,615.78
  5. Step 5: Solve for x
    x = 290,615.78/591.85
  6. Step 6: Final answer
    x = 491.03

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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.