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Finding the Fourth Proportional to 449.01, 619.74 and 274.41

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Solution

The fourth proportional to 449.01, 619.74 and 274.41 is: 378.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.01 : 619.74 = 274.41 : x
  2. Step 2: Convert to fraction form
    449.01/619.74 = 274.41/x
  3. Step 3: Cross multiply
    449.01x = 619.74 × 274.41
  4. Step 4: Simplify right side
    449.01x = 170,062.85
  5. Step 5: Solve for x
    x = 170,062.85/449.01
  6. Step 6: Final answer
    x = 378.75

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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.