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Finding the Fourth Proportional to 618.28, 853.37 and 369.75

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Solution

The fourth proportional to 618.28, 853.37 and 369.75 is: 510.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.28 : 853.37 = 369.75 : x
  2. Step 2: Convert to fraction form
    618.28/853.37 = 369.75/x
  3. Step 3: Cross multiply
    618.28x = 853.37 × 369.75
  4. Step 4: Simplify right side
    618.28x = 315,533.56
  5. Step 5: Solve for x
    x = 315,533.56/618.28
  6. Step 6: Final answer
    x = 510.34

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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.