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Finding the Fourth Proportional to 449.73, 620.81 and 351.52

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Solution

The fourth proportional to 449.73, 620.81 and 351.52 is: 485.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.73 : 620.81 = 351.52 : x
  2. Step 2: Convert to fraction form
    449.73/620.81 = 351.52/x
  3. Step 3: Cross multiply
    449.73x = 620.81 × 351.52
  4. Step 4: Simplify right side
    449.73x = 218,225.37
  5. Step 5: Solve for x
    x = 218,225.37/449.73
  6. Step 6: Final answer
    x = 485.23

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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.