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Finding the Fourth Proportional to 343.48, 515.04 and 138

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Solution

The fourth proportional to 343.48, 515.04 and 138 is: 206.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.48 : 515.04 = 138 : x
  2. Step 2: Convert to fraction form
    343.48/515.04 = 138/x
  3. Step 3: Cross multiply
    343.48x = 515.04 × 138
  4. Step 4: Simplify right side
    343.48x = 71,075.52
  5. Step 5: Solve for x
    x = 71,075.52/343.48
  6. Step 6: Final answer
    x = 206.93

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