Home / 1,221,935.25-1,686,133.78-678,093.96

Finding the Fourth Proportional to 1,221,935.25, 1,686,133.78 and 678,093.96

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Solution

The fourth proportional to 1,221,935.25, 1,686,133.78 and 678,093.96 is: 935,693.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,935.25 : 1,686,133.78 = 678,093.96 : x
  2. Step 2: Convert to fraction form
    1,221,935.25/1,686,133.78 = 678,093.96/x
  3. Step 3: Cross multiply
    1,221,935.25x = 1,686,133.78 × 678,093.96
  4. Step 4: Simplify right side
    1,221,935.25x = 1,143,357,131,969.97
  5. Step 5: Solve for x
    x = 1,143,357,131,969.97/1,221,935.25
  6. Step 6: Final answer
    x = 935,693.71

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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.