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Finding the Fourth Proportional to 515,665.42, 711,607.20 and 286,209.30

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Solution

The fourth proportional to 515,665.42, 711,607.20 and 286,209.30 is: 394,962.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,665.42 : 711,607.20 = 286,209.30 : x
  2. Step 2: Convert to fraction form
    515,665.42/711,607.20 = 286,209.30/x
  3. Step 3: Cross multiply
    515,665.42x = 711,607.20 × 286,209.30
  4. Step 4: Simplify right side
    515,665.42x = 203,668,598,586.96
  5. Step 5: Solve for x
    x = 203,668,598,586.96/515,665.42
  6. Step 6: Final answer
    x = 394,962.68

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