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Finding the Fourth Proportional to 412.82, 618.76 and 169.21

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Solution

The fourth proportional to 412.82, 618.76 and 169.21 is: 253.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.82 : 618.76 = 169.21 : x
  2. Step 2: Convert to fraction form
    412.82/618.76 = 169.21/x
  3. Step 3: Cross multiply
    412.82x = 618.76 × 169.21
  4. Step 4: Simplify right side
    412.82x = 104,698.41
  5. Step 5: Solve for x
    x = 104,698.41/412.82
  6. Step 6: Final answer
    x = 253.62

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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.