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Finding the Fourth Proportional to 1,383, 1,907.17 and 1,173.75

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Solution

The fourth proportional to 1,383, 1,907.17 and 1,173.75 is: 1,618.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383 : 1,907.17 = 1,173.75 : x
  2. Step 2: Convert to fraction form
    1,383/1,907.17 = 1,173.75/x
  3. Step 3: Cross multiply
    1,383x = 1,907.17 × 1,173.75
  4. Step 4: Simplify right side
    1,383x = 2,238,540.79
  5. Step 5: Solve for x
    x = 2,238,540.79/1,383
  6. Step 6: Final answer
    x = 1,618.61

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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.