Home / 811,912.20-1,217,868.30-391,230.60

Finding the Fourth Proportional to 811,912.20, 1,217,868.30 and 391,230.60

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Solution

The fourth proportional to 811,912.20, 1,217,868.30 and 391,230.60 is: 586,845.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,912.20 : 1,217,868.30 = 391,230.60 : x
  2. Step 2: Convert to fraction form
    811,912.20/1,217,868.30 = 391,230.60/x
  3. Step 3: Cross multiply
    811,912.20x = 1,217,868.30 × 391,230.60
  4. Step 4: Simplify right side
    811,912.20x = 476,467,345,729.98
  5. Step 5: Solve for x
    x = 476,467,345,729.98/811,912.20
  6. Step 6: Final answer
    x = 586,845.90

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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.