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Finding the Fourth Proportional to 392,438.80, 588,658.20 and 168,052.60

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Solution

The fourth proportional to 392,438.80, 588,658.20 and 168,052.60 is: 252,078.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,438.80 : 588,658.20 = 168,052.60 : x
  2. Step 2: Convert to fraction form
    392,438.80/588,658.20 = 168,052.60/x
  3. Step 3: Cross multiply
    392,438.80x = 588,658.20 × 168,052.60
  4. Step 4: Simplify right side
    392,438.80x = 98,925,541,021.32
  5. Step 5: Solve for x
    x = 98,925,541,021.32/392,438.80
  6. Step 6: Final answer
    x = 252,078.90

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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.