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Finding the Fourth Proportional to 389,568.60, 584,352.90 and 200,611.80

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Solution

The fourth proportional to 389,568.60, 584,352.90 and 200,611.80 is: 300,917.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,568.60 : 584,352.90 = 200,611.80 : x
  2. Step 2: Convert to fraction form
    389,568.60/584,352.90 = 200,611.80/x
  3. Step 3: Cross multiply
    389,568.60x = 584,352.90 × 200,611.80
  4. Step 4: Simplify right side
    389,568.60x = 117,228,087,104.22
  5. Step 5: Solve for x
    x = 117,228,087,104.22/389,568.60
  6. Step 6: Final answer
    x = 300,917.70

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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.