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Finding the Fourth Proportional to 449.33, 619.29 and 331.17

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Solution

The fourth proportional to 449.33, 619.29 and 331.17 is: 456.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.33 : 619.29 = 331.17 : x
  2. Step 2: Convert to fraction form
    449.33/619.29 = 331.17/x
  3. Step 3: Cross multiply
    449.33x = 619.29 × 331.17
  4. Step 4: Simplify right side
    449.33x = 205,090.27
  5. Step 5: Solve for x
    x = 205,090.27/449.33
  6. Step 6: Final answer
    x = 456.44

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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.