Home / 1,290,625.72-1,780,990.34-717,653.59

Finding the Fourth Proportional to 1,290,625.72, 1,780,990.34 and 717,653.59

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Solution

The fourth proportional to 1,290,625.72, 1,780,990.34 and 717,653.59 is: 990,321.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,625.72 : 1,780,990.34 = 717,653.59 : x
  2. Step 2: Convert to fraction form
    1,290,625.72/1,780,990.34 = 717,653.59/x
  3. Step 3: Cross multiply
    1,290,625.72x = 1,780,990.34 × 717,653.59
  4. Step 4: Simplify right side
    1,290,625.72x = 1,278,134,103,215.58
  5. Step 5: Solve for x
    x = 1,278,134,103,215.58/1,290,625.72
  6. Step 6: Final answer
    x = 990,321.27

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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.