Home / 1,378,619.12-2,067,928.92-431,989.52

Finding the Fourth Proportional to 1,378,619.12, 2,067,928.92 and 431,989.52

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Solution

The fourth proportional to 1,378,619.12, 2,067,928.92 and 431,989.52 is: 647,984.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378,619.12 : 2,067,928.92 = 431,989.52 : x
  2. Step 2: Convert to fraction form
    1,378,619.12/2,067,928.92 = 431,989.52/x
  3. Step 3: Cross multiply
    1,378,619.12x = 2,067,928.92 × 431,989.52
  4. Step 4: Simplify right side
    1,378,619.12x = 893,323,621,544.92
  5. Step 5: Solve for x
    x = 893,323,621,544.92/1,378,619.12
  6. Step 6: Final answer
    x = 647,984.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.