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Finding the Fourth Proportional to 806,299.55, 1,208,605.94 and 300,640.55

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Solution

The fourth proportional to 806,299.55, 1,208,605.94 and 300,640.55 is: 450,646.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,299.55 : 1,208,605.94 = 300,640.55 : x
  2. Step 2: Convert to fraction form
    806,299.55/1,208,605.94 = 300,640.55/x
  3. Step 3: Cross multiply
    806,299.55x = 1,208,605.94 × 300,640.55
  4. Step 4: Simplify right side
    806,299.55x = 363,355,948,491.84
  5. Step 5: Solve for x
    x = 363,355,948,491.84/806,299.55
  6. Step 6: Final answer
    x = 450,646.35

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