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Finding the Fourth Proportional to 539,397.50, 744,648.39 and 394,040.09

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Solution

The fourth proportional to 539,397.50, 744,648.39 and 394,040.09 is: 543,979.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,397.50 : 744,648.39 = 394,040.09 : x
  2. Step 2: Convert to fraction form
    539,397.50/744,648.39 = 394,040.09/x
  3. Step 3: Cross multiply
    539,397.50x = 744,648.39 × 394,040.09
  4. Step 4: Simplify right side
    539,397.50x = 293,421,320,475.58
  5. Step 5: Solve for x
    x = 293,421,320,475.58/539,397.50
  6. Step 6: Final answer
    x = 543,979.76

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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.