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Finding the Fourth Proportional to 509,367.92, 764,051.04 and 135,390.88

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Solution

The fourth proportional to 509,367.92, 764,051.04 and 135,390.88 is: 203,086.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,367.92 : 764,051.04 = 135,390.88 : x
  2. Step 2: Convert to fraction form
    509,367.92/764,051.04 = 135,390.88/x
  3. Step 3: Cross multiply
    509,367.92x = 764,051.04 × 135,390.88
  4. Step 4: Simplify right side
    509,367.92x = 103,445,542,670.52
  5. Step 5: Solve for x
    x = 103,445,542,670.52/509,367.92
  6. Step 6: Final answer
    x = 203,086.10

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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.