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Finding the Fourth Proportional to 369.61, 554.15 and 138.51

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Solution

The fourth proportional to 369.61, 554.15 and 138.51 is: 207.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.61 : 554.15 = 138.51 : x
  2. Step 2: Convert to fraction form
    369.61/554.15 = 138.51/x
  3. Step 3: Cross multiply
    369.61x = 554.15 × 138.51
  4. Step 4: Simplify right side
    369.61x = 76,755.66
  5. Step 5: Solve for x
    x = 76,755.66/369.61
  6. Step 6: Final answer
    x = 207.67

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