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Finding the Fourth Proportional to 255.18, 382.75 and 90.63

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Solution

The fourth proportional to 255.18, 382.75 and 90.63 is: 135.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.18 : 382.75 = 90.63 : x
  2. Step 2: Convert to fraction form
    255.18/382.75 = 90.63/x
  3. Step 3: Cross multiply
    255.18x = 382.75 × 90.63
  4. Step 4: Simplify right side
    255.18x = 34,688.63
  5. Step 5: Solve for x
    x = 34,688.63/255.18
  6. Step 6: Final answer
    x = 135.94

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