Home / 2,779.40-4,167.87-831.23

Finding the Fourth Proportional to 2,779.40, 4,167.87 and 831.23

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Solution

The fourth proportional to 2,779.40, 4,167.87 and 831.23 is: 1,246.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,779.40 : 4,167.87 = 831.23 : x
  2. Step 2: Convert to fraction form
    2,779.40/4,167.87 = 831.23/x
  3. Step 3: Cross multiply
    2,779.40x = 4,167.87 × 831.23
  4. Step 4: Simplify right side
    2,779.40x = 3,464,458.58
  5. Step 5: Solve for x
    x = 3,464,458.58/2,779.40
  6. Step 6: Final answer
    x = 1,246.48

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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.