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Finding the Fourth Proportional to 449.35, 620.06 and 274.59

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Solution

The fourth proportional to 449.35, 620.06 and 274.59 is: 378.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.35 : 620.06 = 274.59 : x
  2. Step 2: Convert to fraction form
    449.35/620.06 = 274.59/x
  3. Step 3: Cross multiply
    449.35x = 620.06 × 274.59
  4. Step 4: Simplify right side
    449.35x = 170,260.90
  5. Step 5: Solve for x
    x = 170,260.90/449.35
  6. Step 6: Final answer
    x = 378.91

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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.