Home / 1,779.40-2,668.80-1,257.76

Finding the Fourth Proportional to 1,779.40, 2,668.80 and 1,257.76

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Solution

The fourth proportional to 1,779.40, 2,668.80 and 1,257.76 is: 1,886.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.40 : 2,668.80 = 1,257.76 : x
  2. Step 2: Convert to fraction form
    1,779.40/2,668.80 = 1,257.76/x
  3. Step 3: Cross multiply
    1,779.40x = 2,668.80 × 1,257.76
  4. Step 4: Simplify right side
    1,779.40x = 3,356,709.89
  5. Step 5: Solve for x
    x = 3,356,709.89/1,779.40
  6. Step 6: Final answer
    x = 1,886.43

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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.