Home / 3,919.66-5,877.96-1,420.25

Finding the Fourth Proportional to 3,919.66, 5,877.96 and 1,420.25

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Solution

The fourth proportional to 3,919.66, 5,877.96 and 1,420.25 is: 2,129.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.66 : 5,877.96 = 1,420.25 : x
  2. Step 2: Convert to fraction form
    3,919.66/5,877.96 = 1,420.25/x
  3. Step 3: Cross multiply
    3,919.66x = 5,877.96 × 1,420.25
  4. Step 4: Simplify right side
    3,919.66x = 8,348,190.23
  5. Step 5: Solve for x
    x = 8,348,190.23/3,919.66
  6. Step 6: Final answer
    x = 2,129.82

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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.