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Finding the Fourth Proportional to 4,276, 6,410.40 and 1,680.80

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Solution

The fourth proportional to 4,276, 6,410.40 and 1,680.80 is: 2,519.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,276 : 6,410.40 = 1,680.80 : x
  2. Step 2: Convert to fraction form
    4,276/6,410.40 = 1,680.80/x
  3. Step 3: Cross multiply
    4,276x = 6,410.40 × 1,680.80
  4. Step 4: Simplify right side
    4,276x = 10,774,600.32
  5. Step 5: Solve for x
    x = 10,774,600.32/4,276
  6. Step 6: Final answer
    x = 2,519.78

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