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Finding the Fourth Proportional to 618.32, 853 and 369.50

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Solution

The fourth proportional to 618.32, 853 and 369.50 is: 509.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.32 : 853 = 369.50 : x
  2. Step 2: Convert to fraction form
    618.32/853 = 369.50/x
  3. Step 3: Cross multiply
    618.32x = 853 × 369.50
  4. Step 4: Simplify right side
    618.32x = 315,183.50
  5. Step 5: Solve for x
    x = 315,183.50/618.32
  6. Step 6: Final answer
    x = 509.74

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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.