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Finding the Fourth Proportional to 310,561.01, 428,589.60 and 189,682.73

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Solution

The fourth proportional to 310,561.01, 428,589.60 and 189,682.73 is: 261,771.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,561.01 : 428,589.60 = 189,682.73 : x
  2. Step 2: Convert to fraction form
    310,561.01/428,589.60 = 189,682.73/x
  3. Step 3: Cross multiply
    310,561.01x = 428,589.60 × 189,682.73
  4. Step 4: Simplify right side
    310,561.01x = 81,296,045,377.61
  5. Step 5: Solve for x
    x = 81,296,045,377.61/310,561.01
  6. Step 6: Final answer
    x = 261,771.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.