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Finding the Fourth Proportional to 618.72, 852.65 and 443.76

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Solution

The fourth proportional to 618.72, 852.65 and 443.76 is: 611.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.72 : 852.65 = 443.76 : x
  2. Step 2: Convert to fraction form
    618.72/852.65 = 443.76/x
  3. Step 3: Cross multiply
    618.72x = 852.65 × 443.76
  4. Step 4: Simplify right side
    618.72x = 378,371.96
  5. Step 5: Solve for x
    x = 378,371.96/618.72
  6. Step 6: Final answer
    x = 611.54

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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.