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Finding the Fourth Proportional to 1,441.94, 2,161.37 and 620.28

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Solution

The fourth proportional to 1,441.94, 2,161.37 and 620.28 is: 929.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.94 : 2,161.37 = 620.28 : x
  2. Step 2: Convert to fraction form
    1,441.94/2,161.37 = 620.28/x
  3. Step 3: Cross multiply
    1,441.94x = 2,161.37 × 620.28
  4. Step 4: Simplify right side
    1,441.94x = 1,340,642.23
  5. Step 5: Solve for x
    x = 1,340,642.23/1,441.94
  6. Step 6: Final answer
    x = 929.75

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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.