Home / 1,388,793.36-1,916,517.60-815,885.76

Finding the Fourth Proportional to 1,388,793.36, 1,916,517.60 and 815,885.76

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Solution

The fourth proportional to 1,388,793.36, 1,916,517.60 and 815,885.76 is: 1,125,912.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,388,793.36 : 1,916,517.60 = 815,885.76 : x
  2. Step 2: Convert to fraction form
    1,388,793.36/1,916,517.60 = 815,885.76/x
  3. Step 3: Cross multiply
    1,388,793.36x = 1,916,517.60 × 815,885.76
  4. Step 4: Simplify right side
    1,388,793.36x = 1,563,659,418,629.38
  5. Step 5: Solve for x
    x = 1,563,659,418,629.38/1,388,793.36
  6. Step 6: Final answer
    x = 1,125,912.22

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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.