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Finding the Fourth Proportional to 579.38, 799.61 and 346.50

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Solution

The fourth proportional to 579.38, 799.61 and 346.50 is: 478.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.38 : 799.61 = 346.50 : x
  2. Step 2: Convert to fraction form
    579.38/799.61 = 346.50/x
  3. Step 3: Cross multiply
    579.38x = 799.61 × 346.50
  4. Step 4: Simplify right side
    579.38x = 277,063.13
  5. Step 5: Solve for x
    x = 277,063.13/579.38
  6. Step 6: Final answer
    x = 478.21

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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.