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Finding the Fourth Proportional to 400.20, 600.30 and 377.80

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Solution

The fourth proportional to 400.20, 600.30 and 377.80 is: 566.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.20 : 600.30 = 377.80 : x
  2. Step 2: Convert to fraction form
    400.20/600.30 = 377.80/x
  3. Step 3: Cross multiply
    400.20x = 600.30 × 377.80
  4. Step 4: Simplify right side
    400.20x = 226,793.34
  5. Step 5: Solve for x
    x = 226,793.34/400.20
  6. Step 6: Final answer
    x = 566.70

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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.