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Finding the Fourth Proportional to 618.11, 852.73 and 369.31

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Solution

The fourth proportional to 618.11, 852.73 and 369.31 is: 509.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.11 : 852.73 = 369.31 : x
  2. Step 2: Convert to fraction form
    618.11/852.73 = 369.31/x
  3. Step 3: Cross multiply
    618.11x = 852.73 × 369.31
  4. Step 4: Simplify right side
    618.11x = 314,919.03
  5. Step 5: Solve for x
    x = 314,919.03/618.11
  6. Step 6: Final answer
    x = 509.48

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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.