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Finding the Fourth Proportional to 421.09, 631.94 and 177.68

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Solution

The fourth proportional to 421.09, 631.94 and 177.68 is: 266.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.09 : 631.94 = 177.68 : x
  2. Step 2: Convert to fraction form
    421.09/631.94 = 177.68/x
  3. Step 3: Cross multiply
    421.09x = 631.94 × 177.68
  4. Step 4: Simplify right side
    421.09x = 112,283.79
  5. Step 5: Solve for x
    x = 112,283.79/421.09
  6. Step 6: Final answer
    x = 266.65

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