Home / 3,485,128.90-5,220,694.95-1,987,471.30

Finding the Fourth Proportional to 3,485,128.90, 5,220,694.95 and 1,987,471.30

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Solution

The fourth proportional to 3,485,128.90, 5,220,694.95 and 1,987,471.30 is: 2,977,215.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,485,128.90 : 5,220,694.95 = 1,987,471.30 : x
  2. Step 2: Convert to fraction form
    3,485,128.90/5,220,694.95 = 1,987,471.30/x
  3. Step 3: Cross multiply
    3,485,128.90x = 5,220,694.95 × 1,987,471.30
  4. Step 4: Simplify right side
    3,485,128.90x = 10,375,981,379,179.94
  5. Step 5: Solve for x
    x = 10,375,981,379,179.94/3,485,128.90
  6. Step 6: Final answer
    x = 2,977,215.96

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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.