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Finding the Fourth Proportional to 398,876.40, 598,314.60 and 257,158.80

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Solution

The fourth proportional to 398,876.40, 598,314.60 and 257,158.80 is: 385,738.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,876.40 : 598,314.60 = 257,158.80 : x
  2. Step 2: Convert to fraction form
    398,876.40/598,314.60 = 257,158.80/x
  3. Step 3: Cross multiply
    398,876.40x = 598,314.60 × 257,158.80
  4. Step 4: Simplify right side
    398,876.40x = 153,861,864,558.48
  5. Step 5: Solve for x
    x = 153,861,864,558.48/398,876.40
  6. Step 6: Final answer
    x = 385,738.20

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