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Finding the Fourth Proportional to 398.04, 596.20 and 380.20

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Solution

The fourth proportional to 398.04, 596.20 and 380.20 is: 569.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.04 : 596.20 = 380.20 : x
  2. Step 2: Convert to fraction form
    398.04/596.20 = 380.20/x
  3. Step 3: Cross multiply
    398.04x = 596.20 × 380.20
  4. Step 4: Simplify right side
    398.04x = 226,675.24
  5. Step 5: Solve for x
    x = 226,675.24/398.04
  6. Step 6: Final answer
    x = 569.48

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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.