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Finding the Fourth Proportional to 393,168.62, 589,783.71 and 140,503.70

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Solution

The fourth proportional to 393,168.62, 589,783.71 and 140,503.70 is: 210,766.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,168.62 : 589,783.71 = 140,503.70 : x
  2. Step 2: Convert to fraction form
    393,168.62/589,783.71 = 140,503.70/x
  3. Step 3: Cross multiply
    393,168.62x = 589,783.71 × 140,503.70
  4. Step 4: Simplify right side
    393,168.62x = 82,866,793,454.73
  5. Step 5: Solve for x
    x = 82,866,793,454.73/393,168.62
  6. Step 6: Final answer
    x = 210,766.55

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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.