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Finding the Fourth Proportional to 392,440.80, 588,661.20 and 313,708.80

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Solution

The fourth proportional to 392,440.80, 588,661.20 and 313,708.80 is: 470,563.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,440.80 : 588,661.20 = 313,708.80 : x
  2. Step 2: Convert to fraction form
    392,440.80/588,661.20 = 313,708.80/x
  3. Step 3: Cross multiply
    392,440.80x = 588,661.20 × 313,708.80
  4. Step 4: Simplify right side
    392,440.80x = 184,668,198,658.56
  5. Step 5: Solve for x
    x = 184,668,198,658.56/392,440.80
  6. Step 6: Final answer
    x = 470,563.20

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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.