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Finding the Fourth Proportional to 394,473, 544,372.74 and 215,625

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Solution

The fourth proportional to 394,473, 544,372.74 and 215,625 is: 297,562.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,473 : 544,372.74 = 215,625 : x
  2. Step 2: Convert to fraction form
    394,473/544,372.74 = 215,625/x
  3. Step 3: Cross multiply
    394,473x = 544,372.74 × 215,625
  4. Step 4: Simplify right side
    394,473x = 117,380,372,062.50
  5. Step 5: Solve for x
    x = 117,380,372,062.50/394,473
  6. Step 6: Final answer
    x = 297,562.50

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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.