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Finding the Fourth Proportional to 3,811.72, 5,717.22 and 1,346.42

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Solution

The fourth proportional to 3,811.72, 5,717.22 and 1,346.42 is: 2,019.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,811.72 : 5,717.22 = 1,346.42 : x
  2. Step 2: Convert to fraction form
    3,811.72/5,717.22 = 1,346.42/x
  3. Step 3: Cross multiply
    3,811.72x = 5,717.22 × 1,346.42
  4. Step 4: Simplify right side
    3,811.72x = 7,697,779.35
  5. Step 5: Solve for x
    x = 7,697,779.35/3,811.72
  6. Step 6: Final answer
    x = 2,019.50

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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.