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Finding the Fourth Proportional to 491.23, 677.91 and 294.76

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Solution

The fourth proportional to 491.23, 677.91 and 294.76 is: 406.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.23 : 677.91 = 294.76 : x
  2. Step 2: Convert to fraction form
    491.23/677.91 = 294.76/x
  3. Step 3: Cross multiply
    491.23x = 677.91 × 294.76
  4. Step 4: Simplify right side
    491.23x = 199,820.75
  5. Step 5: Solve for x
    x = 199,820.75/491.23
  6. Step 6: Final answer
    x = 406.78

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