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Finding the Fourth Proportional to 392,741.40, 589,112.10 and 193,092.60

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Solution

The fourth proportional to 392,741.40, 589,112.10 and 193,092.60 is: 289,638.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,741.40 : 589,112.10 = 193,092.60 : x
  2. Step 2: Convert to fraction form
    392,741.40/589,112.10 = 193,092.60/x
  3. Step 3: Cross multiply
    392,741.40x = 589,112.10 × 193,092.60
  4. Step 4: Simplify right side
    392,741.40x = 113,753,187,080.46
  5. Step 5: Solve for x
    x = 113,753,187,080.46/392,741.40
  6. Step 6: Final answer
    x = 289,638.90

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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.