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Finding the Fourth Proportional to 399.44, 599.30 and 180.05

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Solution

The fourth proportional to 399.44, 599.30 and 180.05 is: 270.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.44 : 599.30 = 180.05 : x
  2. Step 2: Convert to fraction form
    399.44/599.30 = 180.05/x
  3. Step 3: Cross multiply
    399.44x = 599.30 × 180.05
  4. Step 4: Simplify right side
    399.44x = 107,900.74
  5. Step 5: Solve for x
    x = 107,900.74/399.44
  6. Step 6: Final answer
    x = 270.13

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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.