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Finding the Fourth Proportional to 591.62, 816.80 and 381.87

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Solution

The fourth proportional to 591.62, 816.80 and 381.87 is: 527.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.62 : 816.80 = 381.87 : x
  2. Step 2: Convert to fraction form
    591.62/816.80 = 381.87/x
  3. Step 3: Cross multiply
    591.62x = 816.80 × 381.87
  4. Step 4: Simplify right side
    591.62x = 311,909.51
  5. Step 5: Solve for x
    x = 311,909.51/591.62
  6. Step 6: Final answer
    x = 527.22

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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.