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Finding the Fourth Proportional to 618.87, 851.76 and 443.91

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Solution

The fourth proportional to 618.87, 851.76 and 443.91 is: 610.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.87 : 851.76 = 443.91 : x
  2. Step 2: Convert to fraction form
    618.87/851.76 = 443.91/x
  3. Step 3: Cross multiply
    618.87x = 851.76 × 443.91
  4. Step 4: Simplify right side
    618.87x = 378,104.78
  5. Step 5: Solve for x
    x = 378,104.78/618.87
  6. Step 6: Final answer
    x = 610.96

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1.5x scale

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.