Home / 1,290,626.09-1,780,990.85-717,653.96

Finding the Fourth Proportional to 1,290,626.09, 1,780,990.85 and 717,653.96

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Solution

The fourth proportional to 1,290,626.09, 1,780,990.85 and 717,653.96 is: 990,321.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,626.09 : 1,780,990.85 = 717,653.96 : x
  2. Step 2: Convert to fraction form
    1,290,626.09/1,780,990.85 = 717,653.96/x
  3. Step 3: Cross multiply
    1,290,626.09x = 1,780,990.85 × 717,653.96
  4. Step 4: Simplify right side
    1,290,626.09x = 1,278,135,142,472.88
  5. Step 5: Solve for x
    x = 1,278,135,142,472.88/1,290,626.09
  6. Step 6: Final answer
    x = 990,321.79

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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.