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Finding the Fourth Proportional to 437.91, 656.68 and 218.46

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Solution

The fourth proportional to 437.91, 656.68 and 218.46 is: 327.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.91 : 656.68 = 218.46 : x
  2. Step 2: Convert to fraction form
    437.91/656.68 = 218.46/x
  3. Step 3: Cross multiply
    437.91x = 656.68 × 218.46
  4. Step 4: Simplify right side
    437.91x = 143,455.03
  5. Step 5: Solve for x
    x = 143,455.03/437.91
  6. Step 6: Final answer
    x = 327.59

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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.