Home / 1,290,215.26-1,780,557.83-717,265

Finding the Fourth Proportional to 1,290,215.26, 1,780,557.83 and 717,265

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Solution

The fourth proportional to 1,290,215.26, 1,780,557.83 and 717,265 is: 989,859.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,215.26 : 1,780,557.83 = 717,265 : x
  2. Step 2: Convert to fraction form
    1,290,215.26/1,780,557.83 = 717,265/x
  3. Step 3: Cross multiply
    1,290,215.26x = 1,780,557.83 × 717,265
  4. Step 4: Simplify right side
    1,290,215.26x = 1,277,131,811,934.95
  5. Step 5: Solve for x
    x = 1,277,131,811,934.95/1,290,215.26
  6. Step 6: Final answer
    x = 989,859.48

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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.