Home / 1,290,375.87-1,780,818.47-774,149.10

Finding the Fourth Proportional to 1,290,375.87, 1,780,818.47 and 774,149.10

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Solution

The fourth proportional to 1,290,375.87, 1,780,818.47 and 774,149.10 is: 1,068,385.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,375.87 : 1,780,818.47 = 774,149.10 : x
  2. Step 2: Convert to fraction form
    1,290,375.87/1,780,818.47 = 774,149.10/x
  3. Step 3: Cross multiply
    1,290,375.87x = 1,780,818.47 × 774,149.10
  4. Step 4: Simplify right side
    1,290,375.87x = 1,378,619,015,813.88
  5. Step 5: Solve for x
    x = 1,378,619,015,813.88/1,290,375.87
  6. Step 6: Final answer
    x = 1,068,385.61

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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.