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Finding the Fourth Proportional to 394,866.83, 592,299.79 and 128,626.92

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Solution

The fourth proportional to 394,866.83, 592,299.79 and 128,626.92 is: 192,940.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,866.83 : 592,299.79 = 128,626.92 : x
  2. Step 2: Convert to fraction form
    394,866.83/592,299.79 = 128,626.92/x
  3. Step 3: Cross multiply
    394,866.83x = 592,299.79 × 128,626.92
  4. Step 4: Simplify right side
    394,866.83x = 76,185,697,382.78
  5. Step 5: Solve for x
    x = 76,185,697,382.78/394,866.83
  6. Step 6: Final answer
    x = 192,940.23

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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.