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Finding the Fourth Proportional to 386,790.92, 580,087.94 and 120,501.80

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Solution

The fourth proportional to 386,790.92, 580,087.94 and 120,501.80 is: 180,722.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,790.92 : 580,087.94 = 120,501.80 : x
  2. Step 2: Convert to fraction form
    386,790.92/580,087.94 = 120,501.80/x
  3. Step 3: Cross multiply
    386,790.92x = 580,087.94 × 120,501.80
  4. Step 4: Simplify right side
    386,790.92x = 69,901,640,928.29
  5. Step 5: Solve for x
    x = 69,901,640,928.29/386,790.92
  6. Step 6: Final answer
    x = 180,722.03

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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.