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Finding the Fourth Proportional to 368.80, 508.80 and 221.48

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Solution

The fourth proportional to 368.80, 508.80 and 221.48 is: 305.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.80 : 508.80 = 221.48 : x
  2. Step 2: Convert to fraction form
    368.80/508.80 = 221.48/x
  3. Step 3: Cross multiply
    368.80x = 508.80 × 221.48
  4. Step 4: Simplify right side
    368.80x = 112,686.48
  5. Step 5: Solve for x
    x = 112,686.48/368.80
  6. Step 6: Final answer
    x = 305.55

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