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Finding the Fourth Proportional to 618.22, 853.11 and 352.67

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Solution

The fourth proportional to 618.22, 853.11 and 352.67 is: 486.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.22 : 853.11 = 352.67 : x
  2. Step 2: Convert to fraction form
    618.22/853.11 = 352.67/x
  3. Step 3: Cross multiply
    618.22x = 853.11 × 352.67
  4. Step 4: Simplify right side
    618.22x = 300,860.27
  5. Step 5: Solve for x
    x = 300,860.27/618.22
  6. Step 6: Final answer
    x = 486.66

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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.