Home / 812,211.20-1,218,511.20-412,913.60

Finding the Fourth Proportional to 812,211.20, 1,218,511.20 and 412,913.60

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Solution

The fourth proportional to 812,211.20, 1,218,511.20 and 412,913.60 is: 619,469.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,211.20 : 1,218,511.20 = 412,913.60 : x
  2. Step 2: Convert to fraction form
    812,211.20/1,218,511.20 = 412,913.60/x
  3. Step 3: Cross multiply
    812,211.20x = 1,218,511.20 × 412,913.60
  4. Step 4: Simplify right side
    812,211.20x = 503,139,846,232.32
  5. Step 5: Solve for x
    x = 503,139,846,232.32/812,211.20
  6. Step 6: Final answer
    x = 619,469.23

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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.