Home / 1,290,387.62-1,780,834.66-774,160.85

Finding the Fourth Proportional to 1,290,387.62, 1,780,834.66 and 774,160.85

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Solution

The fourth proportional to 1,290,387.62, 1,780,834.66 and 774,160.85 is: 1,068,401.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,387.62 : 1,780,834.66 = 774,160.85 : x
  2. Step 2: Convert to fraction form
    1,290,387.62/1,780,834.66 = 774,160.85/x
  3. Step 3: Cross multiply
    1,290,387.62x = 1,780,834.66 × 774,160.85
  4. Step 4: Simplify right side
    1,290,387.62x = 1,378,652,463,255.49
  5. Step 5: Solve for x
    x = 1,378,652,463,255.49/1,290,387.62
  6. Step 6: Final answer
    x = 1,068,401.81

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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.