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Finding the Fourth Proportional to 386,215.92, 579,324.24 and 219,654

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Solution

The fourth proportional to 386,215.92, 579,324.24 and 219,654 is: 329,481.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,215.92 : 579,324.24 = 219,654 : x
  2. Step 2: Convert to fraction form
    386,215.92/579,324.24 = 219,654/x
  3. Step 3: Cross multiply
    386,215.92x = 579,324.24 × 219,654
  4. Step 4: Simplify right side
    386,215.92x = 127,250,886,612.96
  5. Step 5: Solve for x
    x = 127,250,886,612.96/386,215.92
  6. Step 6: Final answer
    x = 329,481.20

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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.