Home / 2,688.26-4,030.82-813.59

Finding the Fourth Proportional to 2,688.26, 4,030.82 and 813.59

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Solution

The fourth proportional to 2,688.26, 4,030.82 and 813.59 is: 1,219.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.26 : 4,030.82 = 813.59 : x
  2. Step 2: Convert to fraction form
    2,688.26/4,030.82 = 813.59/x
  3. Step 3: Cross multiply
    2,688.26x = 4,030.82 × 813.59
  4. Step 4: Simplify right side
    2,688.26x = 3,279,440.85
  5. Step 5: Solve for x
    x = 3,279,440.85/2,688.26
  6. Step 6: Final answer
    x = 1,219.91

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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.