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Finding the Fourth Proportional to 621,107.39, 857,158.61 and 349,260.86

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Solution

The fourth proportional to 621,107.39, 857,158.61 and 349,260.86 is: 481,997.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,107.39 : 857,158.61 = 349,260.86 : x
  2. Step 2: Convert to fraction form
    621,107.39/857,158.61 = 349,260.86/x
  3. Step 3: Cross multiply
    621,107.39x = 857,158.61 × 349,260.86
  4. Step 4: Simplify right side
    621,107.39x = 299,371,953,285.01
  5. Step 5: Solve for x
    x = 299,371,953,285.01/621,107.39
  6. Step 6: Final answer
    x = 481,997.09

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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.