Home / 1,326,342.80-1,989,028.20-428,020.40

Finding the Fourth Proportional to 1,326,342.80, 1,989,028.20 and 428,020.40

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Solution

The fourth proportional to 1,326,342.80, 1,989,028.20 and 428,020.40 is: 641,873.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326,342.80 : 1,989,028.20 = 428,020.40 : x
  2. Step 2: Convert to fraction form
    1,326,342.80/1,989,028.20 = 428,020.40/x
  3. Step 3: Cross multiply
    1,326,342.80x = 1,989,028.20 × 428,020.40
  4. Step 4: Simplify right side
    1,326,342.80x = 851,344,645,775.28
  5. Step 5: Solve for x
    x = 851,344,645,775.28/1,326,342.80
  6. Step 6: Final answer
    x = 641,873.76

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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.