Home / 420,921.78-580,864.77-229,930.26

Finding the Fourth Proportional to 420,921.78, 580,864.77 and 229,930.26

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Solution

The fourth proportional to 420,921.78, 580,864.77 and 229,930.26 is: 317,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,921.78 : 580,864.77 = 229,930.26 : x
  2. Step 2: Convert to fraction form
    420,921.78/580,864.77 = 229,930.26/x
  3. Step 3: Cross multiply
    420,921.78x = 580,864.77 × 229,930.26
  4. Step 4: Simplify right side
    420,921.78x = 133,558,387,590.94
  5. Step 5: Solve for x
    x = 133,558,387,590.94/420,921.78
  6. Step 6: Final answer
    x = 317,299.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.