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Finding the Fourth Proportional to 392,000.80, 587,223.60 and 214,247.20

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Solution

The fourth proportional to 392,000.80, 587,223.60 and 214,247.20 is: 320,945.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,000.80 : 587,223.60 = 214,247.20 : x
  2. Step 2: Convert to fraction form
    392,000.80/587,223.60 = 214,247.20/x
  3. Step 3: Cross multiply
    392,000.80x = 587,223.60 × 214,247.20
  4. Step 4: Simplify right side
    392,000.80x = 125,811,012,073.92
  5. Step 5: Solve for x
    x = 125,811,012,073.92/392,000.80
  6. Step 6: Final answer
    x = 320,945.80

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1.5x scale

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.