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Finding the Fourth Proportional to 608,929.92, 840,042.92 and 394,139

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Solution

The fourth proportional to 608,929.92, 840,042.92 and 394,139 is: 543,730.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,929.92 : 840,042.92 = 394,139 : x
  2. Step 2: Convert to fraction form
    608,929.92/840,042.92 = 394,139/x
  3. Step 3: Cross multiply
    608,929.92x = 840,042.92 × 394,139
  4. Step 4: Simplify right side
    608,929.92x = 331,093,676,445.88
  5. Step 5: Solve for x
    x = 331,093,676,445.88/608,929.92
  6. Step 6: Final answer
    x = 543,730.35

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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.