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Finding the Fourth Proportional to 307.80, 462.06 and 163.80

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Solution

The fourth proportional to 307.80, 462.06 and 163.80 is: 245.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.80 : 462.06 = 163.80 : x
  2. Step 2: Convert to fraction form
    307.80/462.06 = 163.80/x
  3. Step 3: Cross multiply
    307.80x = 462.06 × 163.80
  4. Step 4: Simplify right side
    307.80x = 75,685.43
  5. Step 5: Solve for x
    x = 75,685.43/307.80
  6. Step 6: Final answer
    x = 245.89

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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.