Home / 1,326,620.70-1,990,321.47-428,045.58

Finding the Fourth Proportional to 1,326,620.70, 1,990,321.47 and 428,045.58

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Solution

The fourth proportional to 1,326,620.70, 1,990,321.47 and 428,045.58 is: 642,194.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326,620.70 : 1,990,321.47 = 428,045.58 : x
  2. Step 2: Convert to fraction form
    1,326,620.70/1,990,321.47 = 428,045.58/x
  3. Step 3: Cross multiply
    1,326,620.70x = 1,990,321.47 × 428,045.58
  4. Step 4: Simplify right side
    1,326,620.70x = 851,948,308,012.60
  5. Step 5: Solve for x
    x = 851,948,308,012.60/1,326,620.70
  6. Step 6: Final answer
    x = 642,194.34

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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.