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Finding the Fourth Proportional to 420.85, 631.06 and 160.89

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Solution

The fourth proportional to 420.85, 631.06 and 160.89 is: 241.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.85 : 631.06 = 160.89 : x
  2. Step 2: Convert to fraction form
    420.85/631.06 = 160.89/x
  3. Step 3: Cross multiply
    420.85x = 631.06 × 160.89
  4. Step 4: Simplify right side
    420.85x = 101,528.47
  5. Step 5: Solve for x
    x = 101,528.47/420.85
  6. Step 6: Final answer
    x = 241.25

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