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Finding the Fourth Proportional to 372.64, 559.14 and 218.20

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Solution

The fourth proportional to 372.64, 559.14 and 218.20 is: 327.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.64 : 559.14 = 218.20 : x
  2. Step 2: Convert to fraction form
    372.64/559.14 = 218.20/x
  3. Step 3: Cross multiply
    372.64x = 559.14 × 218.20
  4. Step 4: Simplify right side
    372.64x = 122,004.35
  5. Step 5: Solve for x
    x = 122,004.35/372.64
  6. Step 6: Final answer
    x = 327.41

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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.