Home / 1,511.31-2,262.11-779.89

Finding the Fourth Proportional to 1,511.31, 2,262.11 and 779.89

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Solution

The fourth proportional to 1,511.31, 2,262.11 and 779.89 is: 1,167.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.31 : 2,262.11 = 779.89 : x
  2. Step 2: Convert to fraction form
    1,511.31/2,262.11 = 779.89/x
  3. Step 3: Cross multiply
    1,511.31x = 2,262.11 × 779.89
  4. Step 4: Simplify right side
    1,511.31x = 1,764,193.07
  5. Step 5: Solve for x
    x = 1,764,193.07/1,511.31
  6. Step 6: Final answer
    x = 1,167.33

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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.