Home / 1,326,621.70-1,990,322.97-428,046.58

Finding the Fourth Proportional to 1,326,621.70, 1,990,322.97 and 428,046.58

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Solution

The fourth proportional to 1,326,621.70, 1,990,322.97 and 428,046.58 is: 642,195.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326,621.70 : 1,990,322.97 = 428,046.58 : x
  2. Step 2: Convert to fraction form
    1,326,621.70/1,990,322.97 = 428,046.58/x
  3. Step 3: Cross multiply
    1,326,621.70x = 1,990,322.97 × 428,046.58
  4. Step 4: Simplify right side
    1,326,621.70x = 851,950,940,403.94
  5. Step 5: Solve for x
    x = 851,950,940,403.94/1,326,621.70
  6. Step 6: Final answer
    x = 642,195.84

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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.