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Finding the Fourth Proportional to 449.88, 620.84 and 253.46

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Solution

The fourth proportional to 449.88, 620.84 and 253.46 is: 349.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.88 : 620.84 = 253.46 : x
  2. Step 2: Convert to fraction form
    449.88/620.84 = 253.46/x
  3. Step 3: Cross multiply
    449.88x = 620.84 × 253.46
  4. Step 4: Simplify right side
    449.88x = 157,356.54
  5. Step 5: Solve for x
    x = 157,356.54/449.88
  6. Step 6: Final answer
    x = 349.77

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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.