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Finding the Fourth Proportional to 618.69, 853.39 and 591.56

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Solution

The fourth proportional to 618.69, 853.39 and 591.56 is: 815.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.69 : 853.39 = 591.56 : x
  2. Step 2: Convert to fraction form
    618.69/853.39 = 591.56/x
  3. Step 3: Cross multiply
    618.69x = 853.39 × 591.56
  4. Step 4: Simplify right side
    618.69x = 504,831.39
  5. Step 5: Solve for x
    x = 504,831.39/618.69
  6. Step 6: Final answer
    x = 815.97

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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.