Home / 2,261.15-3,390.88-779.96

Finding the Fourth Proportional to 2,261.15, 3,390.88 and 779.96

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Solution

The fourth proportional to 2,261.15, 3,390.88 and 779.96 is: 1,169.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.15 : 3,390.88 = 779.96 : x
  2. Step 2: Convert to fraction form
    2,261.15/3,390.88 = 779.96/x
  3. Step 3: Cross multiply
    2,261.15x = 3,390.88 × 779.96
  4. Step 4: Simplify right side
    2,261.15x = 2,644,750.76
  5. Step 5: Solve for x
    x = 2,644,750.76/2,261.15
  6. Step 6: Final answer
    x = 1,169.65

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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.