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Finding the Fourth Proportional to 437.37, 656.20 and 206.43

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Solution

The fourth proportional to 437.37, 656.20 and 206.43 is: 309.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.37 : 656.20 = 206.43 : x
  2. Step 2: Convert to fraction form
    437.37/656.20 = 206.43/x
  3. Step 3: Cross multiply
    437.37x = 656.20 × 206.43
  4. Step 4: Simplify right side
    437.37x = 135,459.37
  5. Step 5: Solve for x
    x = 135,459.37/437.37
  6. Step 6: Final answer
    x = 309.71

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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.