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Finding the Fourth Proportional to 3,145.75, 4,719.43 and 1,196.89

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Solution

The fourth proportional to 3,145.75, 4,719.43 and 1,196.89 is: 1,795.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.75 : 4,719.43 = 1,196.89 : x
  2. Step 2: Convert to fraction form
    3,145.75/4,719.43 = 1,196.89/x
  3. Step 3: Cross multiply
    3,145.75x = 4,719.43 × 1,196.89
  4. Step 4: Simplify right side
    3,145.75x = 5,648,638.57
  5. Step 5: Solve for x
    x = 5,648,638.57/3,145.75
  6. Step 6: Final answer
    x = 1,795.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.