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Finding the Fourth Proportional to 578.81, 868.58 and 236.81

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Solution

The fourth proportional to 578.81, 868.58 and 236.81 is: 355.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.81 : 868.58 = 236.81 : x
  2. Step 2: Convert to fraction form
    578.81/868.58 = 236.81/x
  3. Step 3: Cross multiply
    578.81x = 868.58 × 236.81
  4. Step 4: Simplify right side
    578.81x = 205,687.25
  5. Step 5: Solve for x
    x = 205,687.25/578.81
  6. Step 6: Final answer
    x = 355.36

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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.