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Finding the Fourth Proportional to 484.08, 667.44 and 309.36

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Solution

The fourth proportional to 484.08, 667.44 and 309.36 is: 426.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.08 : 667.44 = 309.36 : x
  2. Step 2: Convert to fraction form
    484.08/667.44 = 309.36/x
  3. Step 3: Cross multiply
    484.08x = 667.44 × 309.36
  4. Step 4: Simplify right side
    484.08x = 206,479.24
  5. Step 5: Solve for x
    x = 206,479.24/484.08
  6. Step 6: Final answer
    x = 426.54

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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.