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Finding the Fourth Proportional to 449.73, 620.64 and 247.85

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Solution

The fourth proportional to 449.73, 620.64 and 247.85 is: 342.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.73 : 620.64 = 247.85 : x
  2. Step 2: Convert to fraction form
    449.73/620.64 = 247.85/x
  3. Step 3: Cross multiply
    449.73x = 620.64 × 247.85
  4. Step 4: Simplify right side
    449.73x = 153,824.38
  5. Step 5: Solve for x
    x = 153,824.38/449.73
  6. Step 6: Final answer
    x = 342.04

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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.