Home / 3,078.81-4,620.49-1,691.89

Finding the Fourth Proportional to 3,078.81, 4,620.49 and 1,691.89

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Solution

The fourth proportional to 3,078.81, 4,620.49 and 1,691.89 is: 2,539.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,078.81 : 4,620.49 = 1,691.89 : x
  2. Step 2: Convert to fraction form
    3,078.81/4,620.49 = 1,691.89/x
  3. Step 3: Cross multiply
    3,078.81x = 4,620.49 × 1,691.89
  4. Step 4: Simplify right side
    3,078.81x = 7,817,354.56
  5. Step 5: Solve for x
    x = 7,817,354.56/3,078.81
  6. Step 6: Final answer
    x = 2,539.08

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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.