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Finding the Fourth Proportional to 291.99, 437.89 and 129.79

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Solution

The fourth proportional to 291.99, 437.89 and 129.79 is: 194.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.99 : 437.89 = 129.79 : x
  2. Step 2: Convert to fraction form
    291.99/437.89 = 129.79/x
  3. Step 3: Cross multiply
    291.99x = 437.89 × 129.79
  4. Step 4: Simplify right side
    291.99x = 56,833.74
  5. Step 5: Solve for x
    x = 56,833.74/291.99
  6. Step 6: Final answer
    x = 194.64

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