Home / 2,778.31-4,165.30-1,390.93

Finding the Fourth Proportional to 2,778.31, 4,165.30 and 1,390.93

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Solution

The fourth proportional to 2,778.31, 4,165.30 and 1,390.93 is: 2,085.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.31 : 4,165.30 = 1,390.93 : x
  2. Step 2: Convert to fraction form
    2,778.31/4,165.30 = 1,390.93/x
  3. Step 3: Cross multiply
    2,778.31x = 4,165.30 × 1,390.93
  4. Step 4: Simplify right side
    2,778.31x = 5,793,632.05
  5. Step 5: Solve for x
    x = 5,793,632.05/2,778.31
  6. Step 6: Final answer
    x = 2,085.31

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.