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Finding the Fourth Proportional to 402.61, 603.71 and 186

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Solution

The fourth proportional to 402.61, 603.71 and 186 is: 278.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.61 : 603.71 = 186 : x
  2. Step 2: Convert to fraction form
    402.61/603.71 = 186/x
  3. Step 3: Cross multiply
    402.61x = 603.71 × 186
  4. Step 4: Simplify right side
    402.61x = 112,290.06
  5. Step 5: Solve for x
    x = 112,290.06/402.61
  6. Step 6: Final answer
    x = 278.91

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