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Finding the Fourth Proportional to 579.68, 799.80 and 372.80

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Solution

The fourth proportional to 579.68, 799.80 and 372.80 is: 514.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.68 : 799.80 = 372.80 : x
  2. Step 2: Convert to fraction form
    579.68/799.80 = 372.80/x
  3. Step 3: Cross multiply
    579.68x = 799.80 × 372.80
  4. Step 4: Simplify right side
    579.68x = 298,165.44
  5. Step 5: Solve for x
    x = 298,165.44/579.68
  6. Step 6: Final answer
    x = 514.36

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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.