Home / 1,216,112.39-1,678,182.78-664,817.61

Finding the Fourth Proportional to 1,216,112.39, 1,678,182.78 and 664,817.61

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Solution

The fourth proportional to 1,216,112.39, 1,678,182.78 and 664,817.61 is: 917,419.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,112.39 : 1,678,182.78 = 664,817.61 : x
  2. Step 2: Convert to fraction form
    1,216,112.39/1,678,182.78 = 664,817.61/x
  3. Step 3: Cross multiply
    1,216,112.39x = 1,678,182.78 × 664,817.61
  4. Step 4: Simplify right side
    1,216,112.39x = 1,115,685,453,959.94
  5. Step 5: Solve for x
    x = 1,115,685,453,959.94/1,216,112.39
  6. Step 6: Final answer
    x = 917,419.69

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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.