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Finding the Fourth Proportional to 785, 1,177.98 and 329

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Solution

The fourth proportional to 785, 1,177.98 and 329 is: 493.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    785 : 1,177.98 = 329 : x
  2. Step 2: Convert to fraction form
    785/1,177.98 = 329/x
  3. Step 3: Cross multiply
    785x = 1,177.98 × 329
  4. Step 4: Simplify right side
    785x = 387,555.42
  5. Step 5: Solve for x
    x = 387,555.42/785
  6. Step 6: Final answer
    x = 493.70

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