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Finding the Fourth Proportional to 578.79, 868.28 and 270.99

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Solution

The fourth proportional to 578.79, 868.28 and 270.99 is: 406.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.79 : 868.28 = 270.99 : x
  2. Step 2: Convert to fraction form
    578.79/868.28 = 270.99/x
  3. Step 3: Cross multiply
    578.79x = 868.28 × 270.99
  4. Step 4: Simplify right side
    578.79x = 235,293.84
  5. Step 5: Solve for x
    x = 235,293.84/578.79
  6. Step 6: Final answer
    x = 406.53

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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.