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Finding the Fourth Proportional to 578.55, 799.17 and 449.22

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Solution

The fourth proportional to 578.55, 799.17 and 449.22 is: 620.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.55 : 799.17 = 449.22 : x
  2. Step 2: Convert to fraction form
    578.55/799.17 = 449.22/x
  3. Step 3: Cross multiply
    578.55x = 799.17 × 449.22
  4. Step 4: Simplify right side
    578.55x = 359,003.15
  5. Step 5: Solve for x
    x = 359,003.15/578.55
  6. Step 6: Final answer
    x = 620.52

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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.