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Finding the Fourth Proportional to 427,517.44, 589,570.56 and 318,861.92

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Solution

The fourth proportional to 427,517.44, 589,570.56 and 318,861.92 is: 439,728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,517.44 : 589,570.56 = 318,861.92 : x
  2. Step 2: Convert to fraction form
    427,517.44/589,570.56 = 318,861.92/x
  3. Step 3: Cross multiply
    427,517.44x = 589,570.56 × 318,861.92
  4. Step 4: Simplify right side
    427,517.44x = 187,991,600,737.08
  5. Step 5: Solve for x
    x = 187,991,600,737.08/427,517.44
  6. Step 6: Final answer
    x = 439,728.50

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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.