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Finding the Fourth Proportional to 579.60, 799.90 and 330.92

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Solution

The fourth proportional to 579.60, 799.90 and 330.92 is: 456.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.60 : 799.90 = 330.92 : x
  2. Step 2: Convert to fraction form
    579.60/799.90 = 330.92/x
  3. Step 3: Cross multiply
    579.60x = 799.90 × 330.92
  4. Step 4: Simplify right side
    579.60x = 264,702.91
  5. Step 5: Solve for x
    x = 264,702.91/579.60
  6. Step 6: Final answer
    x = 456.70

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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.