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Finding the Fourth Proportional to 2,039.60, 3,059.52 and 578.80

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Solution

The fourth proportional to 2,039.60, 3,059.52 and 578.80 is: 868.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,039.60 : 3,059.52 = 578.80 : x
  2. Step 2: Convert to fraction form
    2,039.60/3,059.52 = 578.80/x
  3. Step 3: Cross multiply
    2,039.60x = 3,059.52 × 578.80
  4. Step 4: Simplify right side
    2,039.60x = 1,770,850.18
  5. Step 5: Solve for x
    x = 1,770,850.18/2,039.60
  6. Step 6: Final answer
    x = 868.23

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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.