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Finding the Fourth Proportional to 342.28, 513.18 and 307.84

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Solution

The fourth proportional to 342.28, 513.18 and 307.84 is: 461.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.28 : 513.18 = 307.84 : x
  2. Step 2: Convert to fraction form
    342.28/513.18 = 307.84/x
  3. Step 3: Cross multiply
    342.28x = 513.18 × 307.84
  4. Step 4: Simplify right side
    342.28x = 157,977.33
  5. Step 5: Solve for x
    x = 157,977.33/342.28
  6. Step 6: Final answer
    x = 461.54

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