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Finding the Fourth Proportional to 259,489.80, 389,234.70 and 220,123.80

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Solution

The fourth proportional to 259,489.80, 389,234.70 and 220,123.80 is: 330,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,489.80 : 389,234.70 = 220,123.80 : x
  2. Step 2: Convert to fraction form
    259,489.80/389,234.70 = 220,123.80/x
  3. Step 3: Cross multiply
    259,489.80x = 389,234.70 × 220,123.80
  4. Step 4: Simplify right side
    259,489.80x = 85,679,821,255.86
  5. Step 5: Solve for x
    x = 85,679,821,255.86/259,489.80
  6. Step 6: Final answer
    x = 330,185.70

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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.