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Finding the Fourth Proportional to 403,977.40, 605,966.10 and 385,606.60

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Solution

The fourth proportional to 403,977.40, 605,966.10 and 385,606.60 is: 578,409.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,977.40 : 605,966.10 = 385,606.60 : x
  2. Step 2: Convert to fraction form
    403,977.40/605,966.10 = 385,606.60/x
  3. Step 3: Cross multiply
    403,977.40x = 605,966.10 × 385,606.60
  4. Step 4: Simplify right side
    403,977.40x = 233,664,527,536.26
  5. Step 5: Solve for x
    x = 233,664,527,536.26/403,977.40
  6. Step 6: Final answer
    x = 578,409.90

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