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Finding the Fourth Proportional to 448.74, 672.87 and 231.78

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Solution

The fourth proportional to 448.74, 672.87 and 231.78 is: 347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.74 : 672.87 = 231.78 : x
  2. Step 2: Convert to fraction form
    448.74/672.87 = 231.78/x
  3. Step 3: Cross multiply
    448.74x = 672.87 × 231.78
  4. Step 4: Simplify right side
    448.74x = 155,957.81
  5. Step 5: Solve for x
    x = 155,957.81/448.74
  6. Step 6: Final answer
    x = 347.55

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