Home / 1,391,980.06-1,921,067.31-780,236.74

Finding the Fourth Proportional to 1,391,980.06, 1,921,067.31 and 780,236.74

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Solution

The fourth proportional to 1,391,980.06, 1,921,067.31 and 780,236.74 is: 1,076,802.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,980.06 : 1,921,067.31 = 780,236.74 : x
  2. Step 2: Convert to fraction form
    1,391,980.06/1,921,067.31 = 780,236.74/x
  3. Step 3: Cross multiply
    1,391,980.06x = 1,921,067.31 × 780,236.74
  4. Step 4: Simplify right side
    1,391,980.06x = 1,498,887,295,274.97
  5. Step 5: Solve for x
    x = 1,498,887,295,274.97/1,391,980.06
  6. Step 6: Final answer
    x = 1,076,802.27

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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.