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Finding the Fourth Proportional to 419.24, 628.94 and 145.32

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Solution

The fourth proportional to 419.24, 628.94 and 145.32 is: 218.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.24 : 628.94 = 145.32 : x
  2. Step 2: Convert to fraction form
    419.24/628.94 = 145.32/x
  3. Step 3: Cross multiply
    419.24x = 628.94 × 145.32
  4. Step 4: Simplify right side
    419.24x = 91,397.56
  5. Step 5: Solve for x
    x = 91,397.56/419.24
  6. Step 6: Final answer
    x = 218.01

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