Home / 1,287,703.80-1,933,110.90-1,278,372.60

Finding the Fourth Proportional to 1,287,703.80, 1,933,110.90 and 1,278,372.60

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Solution

The fourth proportional to 1,287,703.80, 1,933,110.90 and 1,278,372.60 is: 1,919,102.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,703.80 : 1,933,110.90 = 1,278,372.60 : x
  2. Step 2: Convert to fraction form
    1,287,703.80/1,933,110.90 = 1,278,372.60/x
  3. Step 3: Cross multiply
    1,287,703.80x = 1,933,110.90 × 1,278,372.60
  4. Step 4: Simplify right side
    1,287,703.80x = 2,471,236,007,321.34
  5. Step 5: Solve for x
    x = 2,471,236,007,321.34/1,287,703.80
  6. Step 6: Final answer
    x = 1,919,102.83

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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.