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Finding the Fourth Proportional to 1,434,371.77, 1,979,446.19 and 789,815.03

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Solution

The fourth proportional to 1,434,371.77, 1,979,446.19 and 789,815.03 is: 1,089,951.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434,371.77 : 1,979,446.19 = 789,815.03 : x
  2. Step 2: Convert to fraction form
    1,434,371.77/1,979,446.19 = 789,815.03/x
  3. Step 3: Cross multiply
    1,434,371.77x = 1,979,446.19 × 789,815.03
  4. Step 4: Simplify right side
    1,434,371.77x = 1,563,396,338,091.93
  5. Step 5: Solve for x
    x = 1,563,396,338,091.93/1,434,371.77
  6. Step 6: Final answer
    x = 1,089,951.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.