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Finding the Fourth Proportional to 1,382.12, 1,907.50 and 792.54

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Solution

The fourth proportional to 1,382.12, 1,907.50 and 792.54 is: 1,093.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.12 : 1,907.50 = 792.54 : x
  2. Step 2: Convert to fraction form
    1,382.12/1,907.50 = 792.54/x
  3. Step 3: Cross multiply
    1,382.12x = 1,907.50 × 792.54
  4. Step 4: Simplify right side
    1,382.12x = 1,511,760.51
  5. Step 5: Solve for x
    x = 1,511,760.51/1,382.12
  6. Step 6: Final answer
    x = 1,093.80

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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.