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Finding the Fourth Proportional to 1,639.87, 2,263 and 893.82

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Solution

The fourth proportional to 1,639.87, 2,263 and 893.82 is: 1,233.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.87 : 2,263 = 893.82 : x
  2. Step 2: Convert to fraction form
    1,639.87/2,263 = 893.82/x
  3. Step 3: Cross multiply
    1,639.87x = 2,263 × 893.82
  4. Step 4: Simplify right side
    1,639.87x = 2,022,714.66
  5. Step 5: Solve for x
    x = 2,022,714.66/1,639.87
  6. Step 6: Final answer
    x = 1,233.46

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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.