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Finding the Fourth Proportional to 509,849.20, 764,773.80 and 426,905.20

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Solution

The fourth proportional to 509,849.20, 764,773.80 and 426,905.20 is: 640,357.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,849.20 : 764,773.80 = 426,905.20 : x
  2. Step 2: Convert to fraction form
    509,849.20/764,773.80 = 426,905.20/x
  3. Step 3: Cross multiply
    509,849.20x = 764,773.80 × 426,905.20
  4. Step 4: Simplify right side
    509,849.20x = 326,485,912,043.76
  5. Step 5: Solve for x
    x = 326,485,912,043.76/509,849.20
  6. Step 6: Final answer
    x = 640,357.80

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.