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Finding the Fourth Proportional to 449.89, 620.84 and 250.72

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Solution

The fourth proportional to 449.89, 620.84 and 250.72 is: 345.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.89 : 620.84 = 250.72 : x
  2. Step 2: Convert to fraction form
    449.89/620.84 = 250.72/x
  3. Step 3: Cross multiply
    449.89x = 620.84 × 250.72
  4. Step 4: Simplify right side
    449.89x = 155,656.08
  5. Step 5: Solve for x
    x = 155,656.08/449.89
  6. Step 6: Final answer
    x = 345.99

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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.