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Finding the Fourth Proportional to 449.77, 620.69 and 272.69

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Solution

The fourth proportional to 449.77, 620.69 and 272.69 is: 376.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.77 : 620.69 = 272.69 : x
  2. Step 2: Convert to fraction form
    449.77/620.69 = 272.69/x
  3. Step 3: Cross multiply
    449.77x = 620.69 × 272.69
  4. Step 4: Simplify right side
    449.77x = 169,255.96
  5. Step 5: Solve for x
    x = 169,255.96/449.77
  6. Step 6: Final answer
    x = 376.32

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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.