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Finding the Fourth Proportional to 455,605.20, 683,407.80 and 218,890.80

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Solution

The fourth proportional to 455,605.20, 683,407.80 and 218,890.80 is: 328,336.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,605.20 : 683,407.80 = 218,890.80 : x
  2. Step 2: Convert to fraction form
    455,605.20/683,407.80 = 218,890.80/x
  3. Step 3: Cross multiply
    455,605.20x = 683,407.80 × 218,890.80
  4. Step 4: Simplify right side
    455,605.20x = 149,591,680,068.24
  5. Step 5: Solve for x
    x = 149,591,680,068.24/455,605.20
  6. Step 6: Final answer
    x = 328,336.20

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