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Finding the Fourth Proportional to 579.12, 799.19 and 330.42

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Solution

The fourth proportional to 579.12, 799.19 and 330.42 is: 455.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.12 : 799.19 = 330.42 : x
  2. Step 2: Convert to fraction form
    579.12/799.19 = 330.42/x
  3. Step 3: Cross multiply
    579.12x = 799.19 × 330.42
  4. Step 4: Simplify right side
    579.12x = 264,066.71
  5. Step 5: Solve for x
    x = 264,066.71/579.12
  6. Step 6: Final answer
    x = 455.98

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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.