Home / 2,131,439.80-2,942,690.40-1,387,074.94

Finding the Fourth Proportional to 2,131,439.80, 2,942,690.40 and 1,387,074.94

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Solution

The fourth proportional to 2,131,439.80, 2,942,690.40 and 1,387,074.94 is: 1,915,011.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131,439.80 : 2,942,690.40 = 1,387,074.94 : x
  2. Step 2: Convert to fraction form
    2,131,439.80/2,942,690.40 = 1,387,074.94/x
  3. Step 3: Cross multiply
    2,131,439.80x = 2,942,690.40 × 1,387,074.94
  4. Step 4: Simplify right side
    2,131,439.80x = 4,081,732,110,018.58
  5. Step 5: Solve for x
    x = 4,081,732,110,018.58/2,131,439.80
  6. Step 6: Final answer
    x = 1,915,011.68

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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.