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Finding the Fourth Proportional to 453.28, 677.12 and 380.40

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Solution

The fourth proportional to 453.28, 677.12 and 380.40 is: 568.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.28 : 677.12 = 380.40 : x
  2. Step 2: Convert to fraction form
    453.28/677.12 = 380.40/x
  3. Step 3: Cross multiply
    453.28x = 677.12 × 380.40
  4. Step 4: Simplify right side
    453.28x = 257,576.45
  5. Step 5: Solve for x
    x = 257,576.45/453.28
  6. Step 6: Final answer
    x = 568.25

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