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Finding the Fourth Proportional to 1,889, 2,831.37 and 961.95

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Solution

The fourth proportional to 1,889, 2,831.37 and 961.95 is: 1,441.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889 : 2,831.37 = 961.95 : x
  2. Step 2: Convert to fraction form
    1,889/2,831.37 = 961.95/x
  3. Step 3: Cross multiply
    1,889x = 2,831.37 × 961.95
  4. Step 4: Simplify right side
    1,889x = 2,723,636.37
  5. Step 5: Solve for x
    x = 2,723,636.37/1,889
  6. Step 6: Final answer
    x = 1,441.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.