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Finding the Fourth Proportional to 1,199.09, 1,653.15 and 825.41

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Solution

The fourth proportional to 1,199.09, 1,653.15 and 825.41 is: 1,137.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.09 : 1,653.15 = 825.41 : x
  2. Step 2: Convert to fraction form
    1,199.09/1,653.15 = 825.41/x
  3. Step 3: Cross multiply
    1,199.09x = 1,653.15 × 825.41
  4. Step 4: Simplify right side
    1,199.09x = 1,364,533.77
  5. Step 5: Solve for x
    x = 1,364,533.77/1,199.09
  6. Step 6: Final answer
    x = 1,137.97

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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.