Home / 3,911.12-5,866.05-1,278.60

Finding the Fourth Proportional to 3,911.12, 5,866.05 and 1,278.60

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Solution

The fourth proportional to 3,911.12, 5,866.05 and 1,278.60 is: 1,917.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.12 : 5,866.05 = 1,278.60 : x
  2. Step 2: Convert to fraction form
    3,911.12/5,866.05 = 1,278.60/x
  3. Step 3: Cross multiply
    3,911.12x = 5,866.05 × 1,278.60
  4. Step 4: Simplify right side
    3,911.12x = 7,500,331.53
  5. Step 5: Solve for x
    x = 7,500,331.53/3,911.12
  6. Step 6: Final answer
    x = 1,917.69

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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.