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Finding the Fourth Proportional to 454.79, 681.03 and 280.94

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Solution

The fourth proportional to 454.79, 681.03 and 280.94 is: 420.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.79 : 681.03 = 280.94 : x
  2. Step 2: Convert to fraction form
    454.79/681.03 = 280.94/x
  3. Step 3: Cross multiply
    454.79x = 681.03 × 280.94
  4. Step 4: Simplify right side
    454.79x = 191,325.16
  5. Step 5: Solve for x
    x = 191,325.16/454.79
  6. Step 6: Final answer
    x = 420.69

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