Home / 2,989.05-4,125.56-1,939.29

Finding the Fourth Proportional to 2,989.05, 4,125.56 and 1,939.29

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Solution

The fourth proportional to 2,989.05, 4,125.56 and 1,939.29 is: 2,676.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.05 : 4,125.56 = 1,939.29 : x
  2. Step 2: Convert to fraction form
    2,989.05/4,125.56 = 1,939.29/x
  3. Step 3: Cross multiply
    2,989.05x = 4,125.56 × 1,939.29
  4. Step 4: Simplify right side
    2,989.05x = 8,000,657.25
  5. Step 5: Solve for x
    x = 8,000,657.25/2,989.05
  6. Step 6: Final answer
    x = 2,676.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.