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Finding the Fourth Proportional to 574.72, 862.80 and 393.28

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Solution

The fourth proportional to 574.72, 862.80 and 393.28 is: 590.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.72 : 862.80 = 393.28 : x
  2. Step 2: Convert to fraction form
    574.72/862.80 = 393.28/x
  3. Step 3: Cross multiply
    574.72x = 862.80 × 393.28
  4. Step 4: Simplify right side
    574.72x = 339,321.98
  5. Step 5: Solve for x
    x = 339,321.98/574.72
  6. Step 6: Final answer
    x = 590.41

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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.