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Finding the Fourth Proportional to 394,785, 544,816.44 and 215,937

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Solution

The fourth proportional to 394,785, 544,816.44 and 215,937 is: 298,000.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,785 : 544,816.44 = 215,937 : x
  2. Step 2: Convert to fraction form
    394,785/544,816.44 = 215,937/x
  3. Step 3: Cross multiply
    394,785x = 544,816.44 × 215,937
  4. Step 4: Simplify right side
    394,785x = 117,646,027,604.28
  5. Step 5: Solve for x
    x = 117,646,027,604.28/394,785
  6. Step 6: Final answer
    x = 298,000.25

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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.