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Finding the Fourth Proportional to 578.94, 866.58 and 396.69

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Solution

The fourth proportional to 578.94, 866.58 and 396.69 is: 593.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.94 : 866.58 = 396.69 : x
  2. Step 2: Convert to fraction form
    578.94/866.58 = 396.69/x
  3. Step 3: Cross multiply
    578.94x = 866.58 × 396.69
  4. Step 4: Simplify right side
    578.94x = 343,763.62
  5. Step 5: Solve for x
    x = 343,763.62/578.94
  6. Step 6: Final answer
    x = 593.78

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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.