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Finding the Fourth Proportional to 437.95, 655.90 and 221

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Solution

The fourth proportional to 437.95, 655.90 and 221 is: 330.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.95 : 655.90 = 221 : x
  2. Step 2: Convert to fraction form
    437.95/655.90 = 221/x
  3. Step 3: Cross multiply
    437.95x = 655.90 × 221
  4. Step 4: Simplify right side
    437.95x = 144,953.90
  5. Step 5: Solve for x
    x = 144,953.90/437.95
  6. Step 6: Final answer
    x = 330.98

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