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Finding the Fourth Proportional to 579.57, 868.48 and 348.21

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Solution

The fourth proportional to 579.57, 868.48 and 348.21 is: 521.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.57 : 868.48 = 348.21 : x
  2. Step 2: Convert to fraction form
    579.57/868.48 = 348.21/x
  3. Step 3: Cross multiply
    579.57x = 868.48 × 348.21
  4. Step 4: Simplify right side
    579.57x = 302,409.95
  5. Step 5: Solve for x
    x = 302,409.95/579.57
  6. Step 6: Final answer
    x = 521.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.