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Finding the Fourth Proportional to 245,891.20, 368,545.20 and 220,813.60

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Solution

The fourth proportional to 245,891.20, 368,545.20 and 220,813.60 is: 330,958.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,891.20 : 368,545.20 = 220,813.60 : x
  2. Step 2: Convert to fraction form
    245,891.20/368,545.20 = 220,813.60/x
  3. Step 3: Cross multiply
    245,891.20x = 368,545.20 × 220,813.60
  4. Step 4: Simplify right side
    245,891.20x = 81,379,792,374.72
  5. Step 5: Solve for x
    x = 81,379,792,374.72/245,891.20
  6. Step 6: Final answer
    x = 330,958.54

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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.