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Finding the Fourth Proportional to 578.44, 867.25 and 285.58

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Solution

The fourth proportional to 578.44, 867.25 and 285.58 is: 428.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.44 : 867.25 = 285.58 : x
  2. Step 2: Convert to fraction form
    578.44/867.25 = 285.58/x
  3. Step 3: Cross multiply
    578.44x = 867.25 × 285.58
  4. Step 4: Simplify right side
    578.44x = 247,669.26
  5. Step 5: Solve for x
    x = 247,669.26/578.44
  6. Step 6: Final answer
    x = 428.17

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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.