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Finding the Fourth Proportional to 425,487.60, 638,231.40 and 268,412.40

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Solution

The fourth proportional to 425,487.60, 638,231.40 and 268,412.40 is: 402,618.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,487.60 : 638,231.40 = 268,412.40 : x
  2. Step 2: Convert to fraction form
    425,487.60/638,231.40 = 268,412.40/x
  3. Step 3: Cross multiply
    425,487.60x = 638,231.40 × 268,412.40
  4. Step 4: Simplify right side
    425,487.60x = 171,309,221,829.36
  5. Step 5: Solve for x
    x = 171,309,221,829.36/425,487.60
  6. Step 6: Final answer
    x = 402,618.60

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