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Finding the Fourth Proportional to 483.72, 667 and 309.04

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Solution

The fourth proportional to 483.72, 667 and 309.04 is: 426.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.72 : 667 = 309.04 : x
  2. Step 2: Convert to fraction form
    483.72/667 = 309.04/x
  3. Step 3: Cross multiply
    483.72x = 667 × 309.04
  4. Step 4: Simplify right side
    483.72x = 206,129.68
  5. Step 5: Solve for x
    x = 206,129.68/483.72
  6. Step 6: Final answer
    x = 426.13

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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.