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Finding the Fourth Proportional to 401.02, 601.56 and 218.20

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Solution

The fourth proportional to 401.02, 601.56 and 218.20 is: 327.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.02 : 601.56 = 218.20 : x
  2. Step 2: Convert to fraction form
    401.02/601.56 = 218.20/x
  3. Step 3: Cross multiply
    401.02x = 601.56 × 218.20
  4. Step 4: Simplify right side
    401.02x = 131,260.39
  5. Step 5: Solve for x
    x = 131,260.39/401.02
  6. Step 6: Final answer
    x = 327.32

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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.