Home / 1,231,385.80-1,847,078.70-811,136.20

Finding the Fourth Proportional to 1,231,385.80, 1,847,078.70 and 811,136.20

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Solution

The fourth proportional to 1,231,385.80, 1,847,078.70 and 811,136.20 is: 1,216,704.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,385.80 : 1,847,078.70 = 811,136.20 : x
  2. Step 2: Convert to fraction form
    1,231,385.80/1,847,078.70 = 811,136.20/x
  3. Step 3: Cross multiply
    1,231,385.80x = 1,847,078.70 × 811,136.20
  4. Step 4: Simplify right side
    1,231,385.80x = 1,498,232,397,818.94
  5. Step 5: Solve for x
    x = 1,498,232,397,818.94/1,231,385.80
  6. Step 6: Final answer
    x = 1,216,704.30

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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.