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Finding the Fourth Proportional to 449.98, 620.97 and 275.33

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Solution

The fourth proportional to 449.98, 620.97 and 275.33 is: 379.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.98 : 620.97 = 275.33 : x
  2. Step 2: Convert to fraction form
    449.98/620.97 = 275.33/x
  3. Step 3: Cross multiply
    449.98x = 620.97 × 275.33
  4. Step 4: Simplify right side
    449.98x = 170,971.67
  5. Step 5: Solve for x
    x = 170,971.67/449.98
  6. Step 6: Final answer
    x = 379.95

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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.