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Finding the Fourth Proportional to 579.78, 799.85 and 346.91

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Solution

The fourth proportional to 579.78, 799.85 and 346.91 is: 478.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.78 : 799.85 = 346.91 : x
  2. Step 2: Convert to fraction form
    579.78/799.85 = 346.91/x
  3. Step 3: Cross multiply
    579.78x = 799.85 × 346.91
  4. Step 4: Simplify right side
    579.78x = 277,470.23
  5. Step 5: Solve for x
    x = 277,470.23/579.78
  6. Step 6: Final answer
    x = 478.58

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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.