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Finding the Fourth Proportional to 412.29, 618.03 and 206.73

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Solution

The fourth proportional to 412.29, 618.03 and 206.73 is: 309.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.29 : 618.03 = 206.73 : x
  2. Step 2: Convert to fraction form
    412.29/618.03 = 206.73/x
  3. Step 3: Cross multiply
    412.29x = 618.03 × 206.73
  4. Step 4: Simplify right side
    412.29x = 127,765.34
  5. Step 5: Solve for x
    x = 127,765.34/412.29
  6. Step 6: Final answer
    x = 309.89

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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.