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Finding the Fourth Proportional to 394,940.67, 545,017.57 and 213,652.20

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Solution

The fourth proportional to 394,940.67, 545,017.57 and 213,652.20 is: 294,839.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,940.67 : 545,017.57 = 213,652.20 : x
  2. Step 2: Convert to fraction form
    394,940.67/545,017.57 = 213,652.20/x
  3. Step 3: Cross multiply
    394,940.67x = 545,017.57 × 213,652.20
  4. Step 4: Simplify right side
    394,940.67x = 116,444,202,869.15
  5. Step 5: Solve for x
    x = 116,444,202,869.15/394,940.67
  6. Step 6: Final answer
    x = 294,839.74

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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.