Home / 2,779.05-4,170.26-1,318.35

Finding the Fourth Proportional to 2,779.05, 4,170.26 and 1,318.35

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Solution

The fourth proportional to 2,779.05, 4,170.26 and 1,318.35 is: 1,978.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.05 : 4,170.26 = 1,318.35 : x
  2. Step 2: Convert to fraction form
    2,779.05/4,170.26 = 1,318.35/x
  3. Step 3: Cross multiply
    2,779.05x = 4,170.26 × 1,318.35
  4. Step 4: Simplify right side
    2,779.05x = 5,497,862.27
  5. Step 5: Solve for x
    x = 5,497,862.27/2,779.05
  6. Step 6: Final answer
    x = 1,978.32

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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.