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Finding the Fourth Proportional to 482.21, 722.13 and 308.36

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Solution

The fourth proportional to 482.21, 722.13 and 308.36 is: 461.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    482.21 : 722.13 = 308.36 : x
  2. Step 2: Convert to fraction form
    482.21/722.13 = 308.36/x
  3. Step 3: Cross multiply
    482.21x = 722.13 × 308.36
  4. Step 4: Simplify right side
    482.21x = 222,676.01
  5. Step 5: Solve for x
    x = 222,676.01/482.21
  6. Step 6: Final answer
    x = 461.78

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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.