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Finding the Fourth Proportional to 392,863.20, 589,294.80 and 112,380.48

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Solution

The fourth proportional to 392,863.20, 589,294.80 and 112,380.48 is: 168,570.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,863.20 : 589,294.80 = 112,380.48 : x
  2. Step 2: Convert to fraction form
    392,863.20/589,294.80 = 112,380.48/x
  3. Step 3: Cross multiply
    392,863.20x = 589,294.80 × 112,380.48
  4. Step 4: Simplify right side
    392,863.20x = 66,225,232,485.50
  5. Step 5: Solve for x
    x = 66,225,232,485.50/392,863.20
  6. Step 6: Final answer
    x = 168,570.72

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Similar ratio
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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.