Home / 1,221,661.40-1,685,835.78-677,791.40

Finding the Fourth Proportional to 1,221,661.40, 1,685,835.78 and 677,791.40

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Solution

The fourth proportional to 1,221,661.40, 1,685,835.78 and 677,791.40 is: 935,320.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,661.40 : 1,685,835.78 = 677,791.40 : x
  2. Step 2: Convert to fraction form
    1,221,661.40/1,685,835.78 = 677,791.40/x
  3. Step 3: Cross multiply
    1,221,661.40x = 1,685,835.78 × 677,791.40
  4. Step 4: Simplify right side
    1,221,661.40x = 1,142,644,993,496.29
  5. Step 5: Solve for x
    x = 1,142,644,993,496.29/1,221,661.40
  6. Step 6: Final answer
    x = 935,320.53

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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.