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Finding the Fourth Proportional to 398.91, 597.81 and 225.48

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Solution

The fourth proportional to 398.91, 597.81 and 225.48 is: 337.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.91 : 597.81 = 225.48 : x
  2. Step 2: Convert to fraction form
    398.91/597.81 = 225.48/x
  3. Step 3: Cross multiply
    398.91x = 597.81 × 225.48
  4. Step 4: Simplify right side
    398.91x = 134,794.20
  5. Step 5: Solve for x
    x = 134,794.20/398.91
  6. Step 6: Final answer
    x = 337.91

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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.