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Finding the Fourth Proportional to 491.71, 678.64 and 295.26

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Solution

The fourth proportional to 491.71, 678.64 and 295.26 is: 407.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.71 : 678.64 = 295.26 : x
  2. Step 2: Convert to fraction form
    491.71/678.64 = 295.26/x
  3. Step 3: Cross multiply
    491.71x = 678.64 × 295.26
  4. Step 4: Simplify right side
    491.71x = 200,375.25
  5. Step 5: Solve for x
    x = 200,375.25/491.71
  6. Step 6: Final answer
    x = 407.51

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