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Finding the Fourth Proportional to 618.06, 852.33 and 408.06

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Solution

The fourth proportional to 618.06, 852.33 and 408.06 is: 562.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.06 : 852.33 = 408.06 : x
  2. Step 2: Convert to fraction form
    618.06/852.33 = 408.06/x
  3. Step 3: Cross multiply
    618.06x = 852.33 × 408.06
  4. Step 4: Simplify right side
    618.06x = 347,801.78
  5. Step 5: Solve for x
    x = 347,801.78/618.06
  6. Step 6: Final answer
    x = 562.73

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