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Finding the Fourth Proportional to 539,443.88, 744,712.50 and 394,086.56

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Solution

The fourth proportional to 539,443.88, 744,712.50 and 394,086.56 is: 544,043.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,443.88 : 744,712.50 = 394,086.56 : x
  2. Step 2: Convert to fraction form
    539,443.88/744,712.50 = 394,086.56/x
  3. Step 3: Cross multiply
    539,443.88x = 744,712.50 × 394,086.56
  4. Step 4: Simplify right side
    539,443.88x = 293,481,187,314
  5. Step 5: Solve for x
    x = 293,481,187,314/539,443.88
  6. Step 6: Final answer
    x = 544,043.96

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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.