Home / 428,922.55-642,965.45-204,222.61

Finding the Fourth Proportional to 428,922.55, 642,965.45 and 204,222.61

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Solution

The fourth proportional to 428,922.55, 642,965.45 and 204,222.61 is: 306,134.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,922.55 : 642,965.45 = 204,222.61 : x
  2. Step 2: Convert to fraction form
    428,922.55/642,965.45 = 204,222.61/x
  3. Step 3: Cross multiply
    428,922.55x = 642,965.45 × 204,222.61
  4. Step 4: Simplify right side
    428,922.55x = 131,308,082,121.42
  5. Step 5: Solve for x
    x = 131,308,082,121.42/428,922.55
  6. Step 6: Final answer
    x = 306,134.71

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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.