Home / 3,945.75-5,918.67-1,172.35

Finding the Fourth Proportional to 3,945.75, 5,918.67 and 1,172.35

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Solution

The fourth proportional to 3,945.75, 5,918.67 and 1,172.35 is: 1,758.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.75 : 5,918.67 = 1,172.35 : x
  2. Step 2: Convert to fraction form
    3,945.75/5,918.67 = 1,172.35/x
  3. Step 3: Cross multiply
    3,945.75x = 5,918.67 × 1,172.35
  4. Step 4: Simplify right side
    3,945.75x = 6,938,746.91
  5. Step 5: Solve for x
    x = 6,938,746.91/3,945.75
  6. Step 6: Final answer
    x = 1,758.54

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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.