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Finding the Fourth Proportional to 618.28, 853.08 and 369.66

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Solution

The fourth proportional to 618.28, 853.08 and 369.66 is: 510.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.28 : 853.08 = 369.66 : x
  2. Step 2: Convert to fraction form
    618.28/853.08 = 369.66/x
  3. Step 3: Cross multiply
    618.28x = 853.08 × 369.66
  4. Step 4: Simplify right side
    618.28x = 315,353.44
  5. Step 5: Solve for x
    x = 315,353.44/618.28
  6. Step 6: Final answer
    x = 510.05

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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.