Home / 679,459.20-1,019,966.40-399,134.40

Finding the Fourth Proportional to 679,459.20, 1,019,966.40 and 399,134.40

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Solution

The fourth proportional to 679,459.20, 1,019,966.40 and 399,134.40 is: 599,158.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,459.20 : 1,019,966.40 = 399,134.40 : x
  2. Step 2: Convert to fraction form
    679,459.20/1,019,966.40 = 399,134.40/x
  3. Step 3: Cross multiply
    679,459.20x = 1,019,966.40 × 399,134.40
  4. Step 4: Simplify right side
    679,459.20x = 407,103,677,084.16
  5. Step 5: Solve for x
    x = 407,103,677,084.16/679,459.20
  6. Step 6: Final answer
    x = 599,158.39

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