Home / 1,221,859.76-1,686,085.45-677,961.07

Finding the Fourth Proportional to 1,221,859.76, 1,686,085.45 and 677,961.07

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Solution

The fourth proportional to 1,221,859.76, 1,686,085.45 and 677,961.07 is: 935,541.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,859.76 : 1,686,085.45 = 677,961.07 : x
  2. Step 2: Convert to fraction form
    1,221,859.76/1,686,085.45 = 677,961.07/x
  3. Step 3: Cross multiply
    1,221,859.76x = 1,686,085.45 × 677,961.07
  4. Step 4: Simplify right side
    1,221,859.76x = 1,143,100,295,793.43
  5. Step 5: Solve for x
    x = 1,143,100,295,793.43/1,221,859.76
  6. Step 6: Final answer
    x = 935,541.32

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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.