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Finding the Fourth Proportional to 394,789.45, 544,813.72 and 213,504.90

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Solution

The fourth proportional to 394,789.45, 544,813.72 and 213,504.90 is: 294,639.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,789.45 : 544,813.72 = 213,504.90 : x
  2. Step 2: Convert to fraction form
    394,789.45/544,813.72 = 213,504.90/x
  3. Step 3: Cross multiply
    394,789.45x = 544,813.72 × 213,504.90
  4. Step 4: Simplify right side
    394,789.45x = 116,320,398,273.47
  5. Step 5: Solve for x
    x = 116,320,398,273.47/394,789.45
  6. Step 6: Final answer
    x = 294,639.08

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1.5x scale

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.