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Finding the Fourth Proportional to 979,761.36, 1,469,735 and 380,768.80

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Solution

The fourth proportional to 979,761.36, 1,469,735 and 380,768.80 is: 571,189.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,761.36 : 1,469,735 = 380,768.80 : x
  2. Step 2: Convert to fraction form
    979,761.36/1,469,735 = 380,768.80/x
  3. Step 3: Cross multiply
    979,761.36x = 1,469,735 × 380,768.80
  4. Step 4: Simplify right side
    979,761.36x = 559,629,232,268
  5. Step 5: Solve for x
    x = 559,629,232,268/979,761.36
  6. Step 6: Final answer
    x = 571,189.33

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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.