Home / 2,779.05-4,166.62-1,391.40

Finding the Fourth Proportional to 2,779.05, 4,166.62 and 1,391.40

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Solution

The fourth proportional to 2,779.05, 4,166.62 and 1,391.40 is: 2,086.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.05 : 4,166.62 = 1,391.40 : x
  2. Step 2: Convert to fraction form
    2,779.05/4,166.62 = 1,391.40/x
  3. Step 3: Cross multiply
    2,779.05x = 4,166.62 × 1,391.40
  4. Step 4: Simplify right side
    2,779.05x = 5,797,435.07
  5. Step 5: Solve for x
    x = 5,797,435.07/2,779.05
  6. Step 6: Final answer
    x = 2,086.12

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1.5x scale

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.