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Finding the Fourth Proportional to 618.62, 853.73 and 369.95

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Solution

The fourth proportional to 618.62, 853.73 and 369.95 is: 510.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.62 : 853.73 = 369.95 : x
  2. Step 2: Convert to fraction form
    618.62/853.73 = 369.95/x
  3. Step 3: Cross multiply
    618.62x = 853.73 × 369.95
  4. Step 4: Simplify right side
    618.62x = 315,831.30
  5. Step 5: Solve for x
    x = 315,831.30/618.62
  6. Step 6: Final answer
    x = 510.55

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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.