Home / 1,188,616.26-1,639,891.53-678,957.78

Finding the Fourth Proportional to 1,188,616.26, 1,639,891.53 and 678,957.78

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Solution

The fourth proportional to 1,188,616.26, 1,639,891.53 and 678,957.78 is: 936,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,616.26 : 1,639,891.53 = 678,957.78 : x
  2. Step 2: Convert to fraction form
    1,188,616.26/1,639,891.53 = 678,957.78/x
  3. Step 3: Cross multiply
    1,188,616.26x = 1,639,891.53 × 678,957.78
  4. Step 4: Simplify right side
    1,188,616.26x = 1,113,417,112,649.60
  5. Step 5: Solve for x
    x = 1,113,417,112,649.60/1,188,616.26
  6. Step 6: Final answer
    x = 936,733.87

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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.