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Finding the Fourth Proportional to 392,950.74, 589,425.34 and 108,640.57

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Solution

The fourth proportional to 392,950.74, 589,425.34 and 108,640.57 is: 162,960.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,950.74 : 589,425.34 = 108,640.57 : x
  2. Step 2: Convert to fraction form
    392,950.74/589,425.34 = 108,640.57/x
  3. Step 3: Cross multiply
    392,950.74x = 589,425.34 × 108,640.57
  4. Step 4: Simplify right side
    392,950.74x = 64,035,504,910.04
  5. Step 5: Solve for x
    x = 64,035,504,910.04/392,950.74
  6. Step 6: Final answer
    x = 162,960.64

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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.