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Finding the Fourth Proportional to 800,467.20, 1,200,290.40 and 239,428.80

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Solution

The fourth proportional to 800,467.20, 1,200,290.40 and 239,428.80 is: 359,020.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,467.20 : 1,200,290.40 = 239,428.80 : x
  2. Step 2: Convert to fraction form
    800,467.20/1,200,290.40 = 239,428.80/x
  3. Step 3: Cross multiply
    800,467.20x = 1,200,290.40 × 239,428.80
  4. Step 4: Simplify right side
    800,467.20x = 287,384,090,123.52
  5. Step 5: Solve for x
    x = 287,384,090,123.52/800,467.20
  6. Step 6: Final answer
    x = 359,020.44

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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.