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Finding the Fourth Proportional to 394,266.87, 544,087.86 and 212,978.76

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Solution

The fourth proportional to 394,266.87, 544,087.86 and 212,978.76 is: 293,910.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,266.87 : 544,087.86 = 212,978.76 : x
  2. Step 2: Convert to fraction form
    394,266.87/544,087.86 = 212,978.76/x
  3. Step 3: Cross multiply
    394,266.87x = 544,087.86 × 212,978.76
  4. Step 4: Simplify right side
    394,266.87x = 115,879,157,753.85
  5. Step 5: Solve for x
    x = 115,879,157,753.85/394,266.87
  6. Step 6: Final answer
    x = 293,910.46

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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.