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Finding the Fourth Proportional to 399.16, 598.74 and 269.38

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Solution

The fourth proportional to 399.16, 598.74 and 269.38 is: 404.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.16 : 598.74 = 269.38 : x
  2. Step 2: Convert to fraction form
    399.16/598.74 = 269.38/x
  3. Step 3: Cross multiply
    399.16x = 598.74 × 269.38
  4. Step 4: Simplify right side
    399.16x = 161,288.58
  5. Step 5: Solve for x
    x = 161,288.58/399.16
  6. Step 6: Final answer
    x = 404.07

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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.