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Finding the Fourth Proportional to 544.28, 816.78 and 215.42

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Solution

The fourth proportional to 544.28, 816.78 and 215.42 is: 323.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.28 : 816.78 = 215.42 : x
  2. Step 2: Convert to fraction form
    544.28/816.78 = 215.42/x
  3. Step 3: Cross multiply
    544.28x = 816.78 × 215.42
  4. Step 4: Simplify right side
    544.28x = 175,950.75
  5. Step 5: Solve for x
    x = 175,950.75/544.28
  6. Step 6: Final answer
    x = 323.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.