Home / 1,690,561.25-2,535,989.48-428,388.92

Finding the Fourth Proportional to 1,690,561.25, 2,535,989.48 and 428,388.92

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Solution

The fourth proportional to 1,690,561.25, 2,535,989.48 and 428,388.92 is: 642,620.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690,561.25 : 2,535,989.48 = 428,388.92 : x
  2. Step 2: Convert to fraction form
    1,690,561.25/2,535,989.48 = 428,388.92/x
  3. Step 3: Cross multiply
    1,690,561.25x = 2,535,989.48 × 428,388.92
  4. Step 4: Simplify right side
    1,690,561.25x = 1,086,389,792,326.62
  5. Step 5: Solve for x
    x = 1,086,389,792,326.62/1,690,561.25
  6. Step 6: Final answer
    x = 642,620.78

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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.