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Finding the Fourth Proportional to 434.88, 651.69 and 280.44

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Solution

The fourth proportional to 434.88, 651.69 and 280.44 is: 420.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.88 : 651.69 = 280.44 : x
  2. Step 2: Convert to fraction form
    434.88/651.69 = 280.44/x
  3. Step 3: Cross multiply
    434.88x = 651.69 × 280.44
  4. Step 4: Simplify right side
    434.88x = 182,759.94
  5. Step 5: Solve for x
    x = 182,759.94/434.88
  6. Step 6: Final answer
    x = 420.25

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