Home / 1,990,190.40-2,986,063.20-728,116.80

Finding the Fourth Proportional to 1,990,190.40, 2,986,063.20 and 728,116.80

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Solution

The fourth proportional to 1,990,190.40, 2,986,063.20 and 728,116.80 is: 1,092,459.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,190.40 : 2,986,063.20 = 728,116.80 : x
  2. Step 2: Convert to fraction form
    1,990,190.40/2,986,063.20 = 728,116.80/x
  3. Step 3: Cross multiply
    1,990,190.40x = 2,986,063.20 × 728,116.80
  4. Step 4: Simplify right side
    1,990,190.40x = 2,174,202,781,781.76
  5. Step 5: Solve for x
    x = 2,174,202,781,781.76/1,990,190.40
  6. Step 6: Final answer
    x = 1,092,459.69

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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.