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Finding the Fourth Proportional to 408,021.40, 611,859.30 and 197,723.80

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Solution

The fourth proportional to 408,021.40, 611,859.30 and 197,723.80 is: 296,501.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,021.40 : 611,859.30 = 197,723.80 : x
  2. Step 2: Convert to fraction form
    408,021.40/611,859.30 = 197,723.80/x
  3. Step 3: Cross multiply
    408,021.40x = 611,859.30 × 197,723.80
  4. Step 4: Simplify right side
    408,021.40x = 120,979,145,861.34
  5. Step 5: Solve for x
    x = 120,979,145,861.34/408,021.40
  6. Step 6: Final answer
    x = 296,501.96

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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.