Home / 2,079,403.20-3,119,104.80-1,278,086.40

Finding the Fourth Proportional to 2,079,403.20, 3,119,104.80 and 1,278,086.40

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Solution

The fourth proportional to 2,079,403.20, 3,119,104.80 and 1,278,086.40 is: 1,917,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079,403.20 : 3,119,104.80 = 1,278,086.40 : x
  2. Step 2: Convert to fraction form
    2,079,403.20/3,119,104.80 = 1,278,086.40/x
  3. Step 3: Cross multiply
    2,079,403.20x = 3,119,104.80 × 1,278,086.40
  4. Step 4: Simplify right side
    2,079,403.20x = 3,986,485,425,054.72
  5. Step 5: Solve for x
    x = 3,986,485,425,054.72/2,079,403.20
  6. Step 6: Final answer
    x = 1,917,129.60

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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.