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Finding the Fourth Proportional to 449.23, 620.72 and 371.47

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Solution

The fourth proportional to 449.23, 620.72 and 371.47 is: 513.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.23 : 620.72 = 371.47 : x
  2. Step 2: Convert to fraction form
    449.23/620.72 = 371.47/x
  3. Step 3: Cross multiply
    449.23x = 620.72 × 371.47
  4. Step 4: Simplify right side
    449.23x = 230,578.86
  5. Step 5: Solve for x
    x = 230,578.86/449.23
  6. Step 6: Final answer
    x = 513.28

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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.