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Finding the Fourth Proportional to 509,620.88, 764,428.92 and 130,540.88

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Solution

The fourth proportional to 509,620.88, 764,428.92 and 130,540.88 is: 195,810.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,620.88 : 764,428.92 = 130,540.88 : x
  2. Step 2: Convert to fraction form
    509,620.88/764,428.92 = 130,540.88/x
  3. Step 3: Cross multiply
    509,620.88x = 764,428.92 × 130,540.88
  4. Step 4: Simplify right side
    509,620.88x = 99,789,223,914.25
  5. Step 5: Solve for x
    x = 99,789,223,914.25/509,620.88
  6. Step 6: Final answer
    x = 195,810.71

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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.