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Finding the Fourth Proportional to 611,940.52, 917,131.92 and 345,849.40

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Solution

The fourth proportional to 611,940.52, 917,131.92 and 345,849.40 is: 518,333.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,940.52 : 917,131.92 = 345,849.40 : x
  2. Step 2: Convert to fraction form
    611,940.52/917,131.92 = 345,849.40/x
  3. Step 3: Cross multiply
    611,940.52x = 917,131.92 × 345,849.40
  4. Step 4: Simplify right side
    611,940.52x = 317,189,524,252.85
  5. Step 5: Solve for x
    x = 317,189,524,252.85/611,940.52
  6. Step 6: Final answer
    x = 518,333.91

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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.