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Finding the Fourth Proportional to 392,866.92, 589,343.85 and 140,206.32

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Solution

The fourth proportional to 392,866.92, 589,343.85 and 140,206.32 is: 210,324.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,866.92 : 589,343.85 = 140,206.32 : x
  2. Step 2: Convert to fraction form
    392,866.92/589,343.85 = 140,206.32/x
  3. Step 3: Cross multiply
    392,866.92x = 589,343.85 × 140,206.32
  4. Step 4: Simplify right side
    392,866.92x = 82,629,732,423.13
  5. Step 5: Solve for x
    x = 82,629,732,423.13/392,866.92
  6. Step 6: Final answer
    x = 210,324.99

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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.