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Finding the Fourth Proportional to 557.36, 769.20 and 324.44

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Solution

The fourth proportional to 557.36, 769.20 and 324.44 is: 447.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.36 : 769.20 = 324.44 : x
  2. Step 2: Convert to fraction form
    557.36/769.20 = 324.44/x
  3. Step 3: Cross multiply
    557.36x = 769.20 × 324.44
  4. Step 4: Simplify right side
    557.36x = 249,559.25
  5. Step 5: Solve for x
    x = 249,559.25/557.36
  6. Step 6: Final answer
    x = 447.75

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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.