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Finding the Fourth Proportional to 504.43, 756.66 and 139.21

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Solution

The fourth proportional to 504.43, 756.66 and 139.21 is: 208.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    504.43 : 756.66 = 139.21 : x
  2. Step 2: Convert to fraction form
    504.43/756.66 = 139.21/x
  3. Step 3: Cross multiply
    504.43x = 756.66 × 139.21
  4. Step 4: Simplify right side
    504.43x = 105,334.64
  5. Step 5: Solve for x
    x = 105,334.64/504.43
  6. Step 6: Final answer
    x = 208.82

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