Home / 3,109.06-4,666.65-1,378.90

Finding the Fourth Proportional to 3,109.06, 4,666.65 and 1,378.90

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Solution

The fourth proportional to 3,109.06, 4,666.65 and 1,378.90 is: 2,069.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109.06 : 4,666.65 = 1,378.90 : x
  2. Step 2: Convert to fraction form
    3,109.06/4,666.65 = 1,378.90/x
  3. Step 3: Cross multiply
    3,109.06x = 4,666.65 × 1,378.90
  4. Step 4: Simplify right side
    3,109.06x = 6,434,843.69
  5. Step 5: Solve for x
    x = 6,434,843.69/3,109.06
  6. Step 6: Final answer
    x = 2,069.71

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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.