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Finding the Fourth Proportional to 394,912.20, 592,368.30 and 261,942.60

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Solution

The fourth proportional to 394,912.20, 592,368.30 and 261,942.60 is: 392,913.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,912.20 : 592,368.30 = 261,942.60 : x
  2. Step 2: Convert to fraction form
    394,912.20/592,368.30 = 261,942.60/x
  3. Step 3: Cross multiply
    394,912.20x = 592,368.30 × 261,942.60
  4. Step 4: Simplify right side
    394,912.20x = 155,166,492,659.58
  5. Step 5: Solve for x
    x = 155,166,492,659.58/394,912.20
  6. Step 6: Final answer
    x = 392,913.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.