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Finding the Fourth Proportional to 403.49, 601.89 and 398.21

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Solution

The fourth proportional to 403.49, 601.89 and 398.21 is: 594.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.49 : 601.89 = 398.21 : x
  2. Step 2: Convert to fraction form
    403.49/601.89 = 398.21/x
  3. Step 3: Cross multiply
    403.49x = 601.89 × 398.21
  4. Step 4: Simplify right side
    403.49x = 239,673.62
  5. Step 5: Solve for x
    x = 239,673.62/403.49
  6. Step 6: Final answer
    x = 594.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.