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Finding the Fourth Proportional to 400.99, 601.35 and 218.20

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Solution

The fourth proportional to 400.99, 601.35 and 218.20 is: 327.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.99 : 601.35 = 218.20 : x
  2. Step 2: Convert to fraction form
    400.99/601.35 = 218.20/x
  3. Step 3: Cross multiply
    400.99x = 601.35 × 218.20
  4. Step 4: Simplify right side
    400.99x = 131,214.57
  5. Step 5: Solve for x
    x = 131,214.57/400.99
  6. Step 6: Final answer
    x = 327.23

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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.