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Finding the Fourth Proportional to 621,558.43, 857,507.71 and 349,563.94

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Solution

The fourth proportional to 621,558.43, 857,507.71 and 349,563.94 is: 482,261.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,558.43 : 857,507.71 = 349,563.94 : x
  2. Step 2: Convert to fraction form
    621,558.43/857,507.71 = 349,563.94/x
  3. Step 3: Cross multiply
    621,558.43x = 857,507.71 × 349,563.94
  4. Step 4: Simplify right side
    621,558.43x = 299,753,773,687.98
  5. Step 5: Solve for x
    x = 299,753,773,687.98/621,558.43
  6. Step 6: Final answer
    x = 482,261.62

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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.