Home / 1,391,993.56-1,921,085.94-780,250.24

Finding the Fourth Proportional to 1,391,993.56, 1,921,085.94 and 780,250.24

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Solution

The fourth proportional to 1,391,993.56, 1,921,085.94 and 780,250.24 is: 1,076,820.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,993.56 : 1,921,085.94 = 780,250.24 : x
  2. Step 2: Convert to fraction form
    1,391,993.56/1,921,085.94 = 780,250.24/x
  3. Step 3: Cross multiply
    1,391,993.56x = 1,921,085.94 × 780,250.24
  4. Step 4: Simplify right side
    1,391,993.56x = 1,498,927,765,745.63
  5. Step 5: Solve for x
    x = 1,498,927,765,745.63/1,391,993.56
  6. Step 6: Final answer
    x = 1,076,820.91

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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.