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Finding the Fourth Proportional to 1,779.31, 2,669.31 and 805.41

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Solution

The fourth proportional to 1,779.31, 2,669.31 and 805.41 is: 1,208.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.31 : 2,669.31 = 805.41 : x
  2. Step 2: Convert to fraction form
    1,779.31/2,669.31 = 805.41/x
  3. Step 3: Cross multiply
    1,779.31x = 2,669.31 × 805.41
  4. Step 4: Simplify right side
    1,779.31x = 2,149,888.97
  5. Step 5: Solve for x
    x = 2,149,888.97/1,779.31
  6. Step 6: Final answer
    x = 1,208.27

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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.