Home / 1,991,438.60-2,986,812.30-728,616.20

Finding the Fourth Proportional to 1,991,438.60, 2,986,812.30 and 728,616.20

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Solution

The fourth proportional to 1,991,438.60, 2,986,812.30 and 728,616.20 is: 1,092,797.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991,438.60 : 2,986,812.30 = 728,616.20 : x
  2. Step 2: Convert to fraction form
    1,991,438.60/2,986,812.30 = 728,616.20/x
  3. Step 3: Cross multiply
    1,991,438.60x = 2,986,812.30 × 728,616.20
  4. Step 4: Simplify right side
    1,991,438.60x = 2,176,239,828,139.26
  5. Step 5: Solve for x
    x = 2,176,239,828,139.26/1,991,438.60
  6. Step 6: Final answer
    x = 1,092,797.85

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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.