Home / 1,990,968.60-2,986,890.30-642,901.80

Finding the Fourth Proportional to 1,990,968.60, 2,986,890.30 and 642,901.80

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Solution

The fourth proportional to 1,990,968.60, 2,986,890.30 and 642,901.80 is: 964,493.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,968.60 : 2,986,890.30 = 642,901.80 : x
  2. Step 2: Convert to fraction form
    1,990,968.60/2,986,890.30 = 642,901.80/x
  3. Step 3: Cross multiply
    1,990,968.60x = 2,986,890.30 × 642,901.80
  4. Step 4: Simplify right side
    1,990,968.60x = 1,920,277,150,272.54
  5. Step 5: Solve for x
    x = 1,920,277,150,272.54/1,990,968.60
  6. Step 6: Final answer
    x = 964,493.94

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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.