Home / 1,391,939.37-1,921,035.69-780,257.34

Finding the Fourth Proportional to 1,391,939.37, 1,921,035.69 and 780,257.34

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Solution

The fourth proportional to 1,391,939.37, 1,921,035.69 and 780,257.34 is: 1,076,844.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,939.37 : 1,921,035.69 = 780,257.34 : x
  2. Step 2: Convert to fraction form
    1,391,939.37/1,921,035.69 = 780,257.34/x
  3. Step 3: Cross multiply
    1,391,939.37x = 1,921,035.69 × 780,257.34
  4. Step 4: Simplify right side
    1,391,939.37x = 1,498,902,197,524.46
  5. Step 5: Solve for x
    x = 1,498,902,197,524.46/1,391,939.37
  6. Step 6: Final answer
    x = 1,076,844.46

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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.