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Finding the Fourth Proportional to 393,462.40, 590,193.60 and 156,974.80

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Solution

The fourth proportional to 393,462.40, 590,193.60 and 156,974.80 is: 235,462.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,462.40 : 590,193.60 = 156,974.80 : x
  2. Step 2: Convert to fraction form
    393,462.40/590,193.60 = 156,974.80/x
  3. Step 3: Cross multiply
    393,462.40x = 590,193.60 × 156,974.80
  4. Step 4: Simplify right side
    393,462.40x = 92,645,522,321.28
  5. Step 5: Solve for x
    x = 92,645,522,321.28/393,462.40
  6. Step 6: Final answer
    x = 235,462.20

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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.