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Finding the Fourth Proportional to 1,433.87, 2,150.57 and 878.39

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Solution

The fourth proportional to 1,433.87, 2,150.57 and 878.39 is: 1,317.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433.87 : 2,150.57 = 878.39 : x
  2. Step 2: Convert to fraction form
    1,433.87/2,150.57 = 878.39/x
  3. Step 3: Cross multiply
    1,433.87x = 2,150.57 × 878.39
  4. Step 4: Simplify right side
    1,433.87x = 1,889,039.18
  5. Step 5: Solve for x
    x = 1,889,039.18/1,433.87
  6. Step 6: Final answer
    x = 1,317.44

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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.