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Finding the Fourth Proportional to 509,126.40, 764,505.60 and 404,812.80

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Solution

The fourth proportional to 509,126.40, 764,505.60 and 404,812.80 is: 607,868.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,126.40 : 764,505.60 = 404,812.80 : x
  2. Step 2: Convert to fraction form
    509,126.40/764,505.60 = 404,812.80/x
  3. Step 3: Cross multiply
    509,126.40x = 764,505.60 × 404,812.80
  4. Step 4: Simplify right side
    509,126.40x = 309,481,652,551.68
  5. Step 5: Solve for x
    x = 309,481,652,551.68/509,126.40
  6. Step 6: Final answer
    x = 607,868.01

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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.