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Finding the Fourth Proportional to 483.47, 667.34 and 308.81

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Solution

The fourth proportional to 483.47, 667.34 and 308.81 is: 426.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.47 : 667.34 = 308.81 : x
  2. Step 2: Convert to fraction form
    483.47/667.34 = 308.81/x
  3. Step 3: Cross multiply
    483.47x = 667.34 × 308.81
  4. Step 4: Simplify right side
    483.47x = 206,082.55
  5. Step 5: Solve for x
    x = 206,082.55/483.47
  6. Step 6: Final answer
    x = 426.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.