Home / 1,990,720.80-2,986,081.20-661,024.80

Finding the Fourth Proportional to 1,990,720.80, 2,986,081.20 and 661,024.80

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Solution

The fourth proportional to 1,990,720.80, 2,986,081.20 and 661,024.80 is: 991,537.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,720.80 : 2,986,081.20 = 661,024.80 : x
  2. Step 2: Convert to fraction form
    1,990,720.80/2,986,081.20 = 661,024.80/x
  3. Step 3: Cross multiply
    1,990,720.80x = 2,986,081.20 × 661,024.80
  4. Step 4: Simplify right side
    1,990,720.80x = 1,973,873,728,013.76
  5. Step 5: Solve for x
    x = 1,973,873,728,013.76/1,990,720.80
  6. Step 6: Final answer
    x = 991,537.20

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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.