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Finding the Fourth Proportional to 557.05, 768.78 and 324.13

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Solution

The fourth proportional to 557.05, 768.78 and 324.13 is: 447.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.05 : 768.78 = 324.13 : x
  2. Step 2: Convert to fraction form
    557.05/768.78 = 324.13/x
  3. Step 3: Cross multiply
    557.05x = 768.78 × 324.13
  4. Step 4: Simplify right side
    557.05x = 249,179.20
  5. Step 5: Solve for x
    x = 249,179.20/557.05
  6. Step 6: Final answer
    x = 447.32

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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.