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Finding the Fourth Proportional to 392,997.35, 589,475.37 and 126,757.91

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Solution

The fourth proportional to 392,997.35, 589,475.37 and 126,757.91 is: 190,130.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,997.35 : 589,475.37 = 126,757.91 : x
  2. Step 2: Convert to fraction form
    392,997.35/589,475.37 = 126,757.91/x
  3. Step 3: Cross multiply
    392,997.35x = 589,475.37 × 126,757.91
  4. Step 4: Simplify right side
    392,997.35x = 74,720,667,846.71
  5. Step 5: Solve for x
    x = 74,720,667,846.71/392,997.35
  6. Step 6: Final answer
    x = 190,130.21

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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.