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Finding the Fourth Proportional to 978,409.20, 1,467,540.90 and 409,643.40

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Solution

The fourth proportional to 978,409.20, 1,467,540.90 and 409,643.40 is: 614,434.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,409.20 : 1,467,540.90 = 409,643.40 : x
  2. Step 2: Convert to fraction form
    978,409.20/1,467,540.90 = 409,643.40/x
  3. Step 3: Cross multiply
    978,409.20x = 1,467,540.90 × 409,643.40
  4. Step 4: Simplify right side
    978,409.20x = 601,168,443,915.06
  5. Step 5: Solve for x
    x = 601,168,443,915.06/978,409.20
  6. Step 6: Final answer
    x = 614,434.58

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