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Finding the Fourth Proportional to 618.12, 852.66 and 355.95

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Solution

The fourth proportional to 618.12, 852.66 and 355.95 is: 491.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.12 : 852.66 = 355.95 : x
  2. Step 2: Convert to fraction form
    618.12/852.66 = 355.95/x
  3. Step 3: Cross multiply
    618.12x = 852.66 × 355.95
  4. Step 4: Simplify right side
    618.12x = 303,504.33
  5. Step 5: Solve for x
    x = 303,504.33/618.12
  6. Step 6: Final answer
    x = 491.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.