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Finding the Fourth Proportional to 399.50, 598.24 and 338.90

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Solution

The fourth proportional to 399.50, 598.24 and 338.90 is: 507.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.50 : 598.24 = 338.90 : x
  2. Step 2: Convert to fraction form
    399.50/598.24 = 338.90/x
  3. Step 3: Cross multiply
    399.50x = 598.24 × 338.90
  4. Step 4: Simplify right side
    399.50x = 202,743.54
  5. Step 5: Solve for x
    x = 202,743.54/399.50
  6. Step 6: Final answer
    x = 507.49

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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.