Home / 1,392,013.87-1,921,138.50-780,331.84

Finding the Fourth Proportional to 1,392,013.87, 1,921,138.50 and 780,331.84

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Solution

The fourth proportional to 1,392,013.87, 1,921,138.50 and 780,331.84 is: 1,076,947.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,013.87 : 1,921,138.50 = 780,331.84 : x
  2. Step 2: Convert to fraction form
    1,392,013.87/1,921,138.50 = 780,331.84/x
  3. Step 3: Cross multiply
    1,392,013.87x = 1,921,138.50 × 780,331.84
  4. Step 4: Simplify right side
    1,392,013.87x = 1,499,125,540,599.84
  5. Step 5: Solve for x
    x = 1,499,125,540,599.84/1,392,013.87
  6. Step 6: Final answer
    x = 1,076,947.27

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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.