Home / 2,788.40-4,188.14-2,690

Finding the Fourth Proportional to 2,788.40, 4,188.14 and 2,690

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Solution

The fourth proportional to 2,788.40, 4,188.14 and 2,690 is: 4,040.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788.40 : 4,188.14 = 2,690 : x
  2. Step 2: Convert to fraction form
    2,788.40/4,188.14 = 2,690/x
  3. Step 3: Cross multiply
    2,788.40x = 4,188.14 × 2,690
  4. Step 4: Simplify right side
    2,788.40x = 11,266,096.60
  5. Step 5: Solve for x
    x = 11,266,096.60/2,788.40
  6. Step 6: Final answer
    x = 4,040.34

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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.