Home / 5,186.46-7,779.77-1,290.87

Finding the Fourth Proportional to 5,186.46, 7,779.77 and 1,290.87

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Solution

The fourth proportional to 5,186.46, 7,779.77 and 1,290.87 is: 1,936.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,186.46 : 7,779.77 = 1,290.87 : x
  2. Step 2: Convert to fraction form
    5,186.46/7,779.77 = 1,290.87/x
  3. Step 3: Cross multiply
    5,186.46x = 7,779.77 × 1,290.87
  4. Step 4: Simplify right side
    5,186.46x = 10,042,670.09
  5. Step 5: Solve for x
    x = 10,042,670.09/5,186.46
  6. Step 6: Final answer
    x = 1,936.32

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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.