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Finding the Fourth Proportional to 1,379.81, 2,070.93 and 1,163.54

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Solution

The fourth proportional to 1,379.81, 2,070.93 and 1,163.54 is: 1,746.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.81 : 2,070.93 = 1,163.54 : x
  2. Step 2: Convert to fraction form
    1,379.81/2,070.93 = 1,163.54/x
  3. Step 3: Cross multiply
    1,379.81x = 2,070.93 × 1,163.54
  4. Step 4: Simplify right side
    1,379.81x = 2,409,609.89
  5. Step 5: Solve for x
    x = 2,409,609.89/1,379.81
  6. Step 6: Final answer
    x = 1,746.33

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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.