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Finding the Fourth Proportional to 412.08, 568.10 and 399.30

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Solution

The fourth proportional to 412.08, 568.10 and 399.30 is: 550.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.08 : 568.10 = 399.30 : x
  2. Step 2: Convert to fraction form
    412.08/568.10 = 399.30/x
  3. Step 3: Cross multiply
    412.08x = 568.10 × 399.30
  4. Step 4: Simplify right side
    412.08x = 226,842.33
  5. Step 5: Solve for x
    x = 226,842.33/412.08
  6. Step 6: Final answer
    x = 550.48

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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.