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Finding the Fourth Proportional to 393,478.60, 590,217.90 and 168,800.80

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Solution

The fourth proportional to 393,478.60, 590,217.90 and 168,800.80 is: 253,201.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,478.60 : 590,217.90 = 168,800.80 : x
  2. Step 2: Convert to fraction form
    393,478.60/590,217.90 = 168,800.80/x
  3. Step 3: Cross multiply
    393,478.60x = 590,217.90 × 168,800.80
  4. Step 4: Simplify right side
    393,478.60x = 99,629,253,694.32
  5. Step 5: Solve for x
    x = 99,629,253,694.32/393,478.60
  6. Step 6: Final answer
    x = 253,201.20

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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.