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Finding the Fourth Proportional to 579.20, 798.91 and 357.87

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Solution

The fourth proportional to 579.20, 798.91 and 357.87 is: 493.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.20 : 798.91 = 357.87 : x
  2. Step 2: Convert to fraction form
    579.20/798.91 = 357.87/x
  3. Step 3: Cross multiply
    579.20x = 798.91 × 357.87
  4. Step 4: Simplify right side
    579.20x = 285,905.92
  5. Step 5: Solve for x
    x = 285,905.92/579.20
  6. Step 6: Final answer
    x = 493.62

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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.