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Finding the Fourth Proportional to 424,388.36, 636,590.46 and 339,755.42

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Solution

The fourth proportional to 424,388.36, 636,590.46 and 339,755.42 is: 509,639.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,388.36 : 636,590.46 = 339,755.42 : x
  2. Step 2: Convert to fraction form
    424,388.36/636,590.46 = 339,755.42/x
  3. Step 3: Cross multiply
    424,388.36x = 636,590.46 × 339,755.42
  4. Step 4: Simplify right side
    424,388.36x = 216,285,059,105.29
  5. Step 5: Solve for x
    x = 216,285,059,105.29/424,388.36
  6. Step 6: Final answer
    x = 509,639.47

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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.