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Finding the Fourth Proportional to 393,739.30, 590,220.15 and 156,765.70

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Solution

The fourth proportional to 393,739.30, 590,220.15 and 156,765.70 is: 234,993.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,739.30 : 590,220.15 = 156,765.70 : x
  2. Step 2: Convert to fraction form
    393,739.30/590,220.15 = 156,765.70/x
  3. Step 3: Cross multiply
    393,739.30x = 590,220.15 × 156,765.70
  4. Step 4: Simplify right side
    393,739.30x = 92,526,274,968.86
  5. Step 5: Solve for x
    x = 92,526,274,968.86/393,739.30
  6. Step 6: Final answer
    x = 234,993.75

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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.