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Finding the Fourth Proportional to 394,939.67, 545,016.20 and 213,651.20

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Solution

The fourth proportional to 394,939.67, 545,016.20 and 213,651.20 is: 294,838.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,939.67 : 545,016.20 = 213,651.20 : x
  2. Step 2: Convert to fraction form
    394,939.67/545,016.20 = 213,651.20/x
  3. Step 3: Cross multiply
    394,939.67x = 545,016.20 × 213,651.20
  4. Step 4: Simplify right side
    394,939.67x = 116,443,365,443.72
  5. Step 5: Solve for x
    x = 116,443,365,443.72/394,939.67
  6. Step 6: Final answer
    x = 294,838.37

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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.