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Finding the Fourth Proportional to 621,107.89, 857,159.30 and 349,261.36

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Solution

The fourth proportional to 621,107.89, 857,159.30 and 349,261.36 is: 481,997.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,107.89 : 857,159.30 = 349,261.36 : x
  2. Step 2: Convert to fraction form
    621,107.89/857,159.30 = 349,261.36/x
  3. Step 3: Cross multiply
    621,107.89x = 857,159.30 × 349,261.36
  4. Step 4: Simplify right side
    621,107.89x = 299,372,622,854.65
  5. Step 5: Solve for x
    x = 299,372,622,854.65/621,107.89
  6. Step 6: Final answer
    x = 481,997.78

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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.