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Finding the Fourth Proportional to 424,092.20, 636,138.30 and 405,890.60

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Solution

The fourth proportional to 424,092.20, 636,138.30 and 405,890.60 is: 608,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,092.20 : 636,138.30 = 405,890.60 : x
  2. Step 2: Convert to fraction form
    424,092.20/636,138.30 = 405,890.60/x
  3. Step 3: Cross multiply
    424,092.20x = 636,138.30 × 405,890.60
  4. Step 4: Simplify right side
    424,092.20x = 258,202,556,269.98
  5. Step 5: Solve for x
    x = 258,202,556,269.98/424,092.20
  6. Step 6: Final answer
    x = 608,835.90

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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.