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Finding the Fourth Proportional to 270.58, 406.07 and 209.56

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Solution

The fourth proportional to 270.58, 406.07 and 209.56 is: 314.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.58 : 406.07 = 209.56 : x
  2. Step 2: Convert to fraction form
    270.58/406.07 = 209.56/x
  3. Step 3: Cross multiply
    270.58x = 406.07 × 209.56
  4. Step 4: Simplify right side
    270.58x = 85,096.03
  5. Step 5: Solve for x
    x = 85,096.03/270.58
  6. Step 6: Final answer
    x = 314.49

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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.