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Finding the Fourth Proportional to 1,188.26, 1,640.36 and 893.64

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Solution

The fourth proportional to 1,188.26, 1,640.36 and 893.64 is: 1,233.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.26 : 1,640.36 = 893.64 : x
  2. Step 2: Convert to fraction form
    1,188.26/1,640.36 = 893.64/x
  3. Step 3: Cross multiply
    1,188.26x = 1,640.36 × 893.64
  4. Step 4: Simplify right side
    1,188.26x = 1,465,891.31
  5. Step 5: Solve for x
    x = 1,465,891.31/1,188.26
  6. Step 6: Final answer
    x = 1,233.65

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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.