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Finding the Fourth Proportional to 437.87, 656.94 and 221.33

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Solution

The fourth proportional to 437.87, 656.94 and 221.33 is: 332.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.87 : 656.94 = 221.33 : x
  2. Step 2: Convert to fraction form
    437.87/656.94 = 221.33/x
  3. Step 3: Cross multiply
    437.87x = 656.94 × 221.33
  4. Step 4: Simplify right side
    437.87x = 145,400.53
  5. Step 5: Solve for x
    x = 145,400.53/437.87
  6. Step 6: Final answer
    x = 332.06

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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.