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Finding the Fourth Proportional to 1,639.88, 2,263.07 and 893.89

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Solution

The fourth proportional to 1,639.88, 2,263.07 and 893.89 is: 1,233.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.88 : 2,263.07 = 893.89 : x
  2. Step 2: Convert to fraction form
    1,639.88/2,263.07 = 893.89/x
  3. Step 3: Cross multiply
    1,639.88x = 2,263.07 × 893.89
  4. Step 4: Simplify right side
    1,639.88x = 2,022,919.86
  5. Step 5: Solve for x
    x = 2,022,919.86/1,639.88
  6. Step 6: Final answer
    x = 1,233.58

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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.