Home / 811,219.80-1,216,829.70-686,803.80

Finding the Fourth Proportional to 811,219.80, 1,216,829.70 and 686,803.80

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Solution

The fourth proportional to 811,219.80, 1,216,829.70 and 686,803.80 is: 1,030,205.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,219.80 : 1,216,829.70 = 686,803.80 : x
  2. Step 2: Convert to fraction form
    811,219.80/1,216,829.70 = 686,803.80/x
  3. Step 3: Cross multiply
    811,219.80x = 1,216,829.70 × 686,803.80
  4. Step 4: Simplify right side
    811,219.80x = 835,723,261,912.86
  5. Step 5: Solve for x
    x = 835,723,261,912.86/811,219.80
  6. Step 6: Final answer
    x = 1,030,205.70

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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.