Home / 1,421.67-1,960.19-1,185.96

Finding the Fourth Proportional to 1,421.67, 1,960.19 and 1,185.96

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Solution

The fourth proportional to 1,421.67, 1,960.19 and 1,185.96 is: 1,635.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.67 : 1,960.19 = 1,185.96 : x
  2. Step 2: Convert to fraction form
    1,421.67/1,960.19 = 1,185.96/x
  3. Step 3: Cross multiply
    1,421.67x = 1,960.19 × 1,185.96
  4. Step 4: Simplify right side
    1,421.67x = 2,324,706.93
  5. Step 5: Solve for x
    x = 2,324,706.93/1,421.67
  6. Step 6: Final answer
    x = 1,635.19

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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.