Home / 820,389.87-1,228,813.34-800,313.21

Finding the Fourth Proportional to 820,389.87, 1,228,813.34 and 800,313.21

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Solution

The fourth proportional to 820,389.87, 1,228,813.34 and 800,313.21 is: 1,198,741.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,389.87 : 1,228,813.34 = 800,313.21 : x
  2. Step 2: Convert to fraction form
    820,389.87/1,228,813.34 = 800,313.21/x
  3. Step 3: Cross multiply
    820,389.87x = 1,228,813.34 × 800,313.21
  4. Step 4: Simplify right side
    820,389.87x = 983,435,544,624.66
  5. Step 5: Solve for x
    x = 983,435,544,624.66/820,389.87
  6. Step 6: Final answer
    x = 1,198,741.70

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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.