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Finding the Fourth Proportional to 611.01, 842.76 and 389.70

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Solution

The fourth proportional to 611.01, 842.76 and 389.70 is: 537.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.01 : 842.76 = 389.70 : x
  2. Step 2: Convert to fraction form
    611.01/842.76 = 389.70/x
  3. Step 3: Cross multiply
    611.01x = 842.76 × 389.70
  4. Step 4: Simplify right side
    611.01x = 328,423.57
  5. Step 5: Solve for x
    x = 328,423.57/611.01
  6. Step 6: Final answer
    x = 537.51

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