Home / 3,412.85-5,108.74-1,909.76

Finding the Fourth Proportional to 3,412.85, 5,108.74 and 1,909.76

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Solution

The fourth proportional to 3,412.85, 5,108.74 and 1,909.76 is: 2,858.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.85 : 5,108.74 = 1,909.76 : x
  2. Step 2: Convert to fraction form
    3,412.85/5,108.74 = 1,909.76/x
  3. Step 3: Cross multiply
    3,412.85x = 5,108.74 × 1,909.76
  4. Step 4: Simplify right side
    3,412.85x = 9,756,436.98
  5. Step 5: Solve for x
    x = 9,756,436.98/3,412.85
  6. Step 6: Final answer
    x = 2,858.74

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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.