Home / 811,930.80-1,217,896.20-768,385.20

Finding the Fourth Proportional to 811,930.80, 1,217,896.20 and 768,385.20

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Solution

The fourth proportional to 811,930.80, 1,217,896.20 and 768,385.20 is: 1,152,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,930.80 : 1,217,896.20 = 768,385.20 : x
  2. Step 2: Convert to fraction form
    811,930.80/1,217,896.20 = 768,385.20/x
  3. Step 3: Cross multiply
    811,930.80x = 1,217,896.20 × 768,385.20
  4. Step 4: Simplify right side
    811,930.80x = 935,813,415,216.24
  5. Step 5: Solve for x
    x = 935,813,415,216.24/811,930.80
  6. Step 6: Final answer
    x = 1,152,577.80

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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.