Home / 3,117.40-4,676.10-2,939.20

Finding the Fourth Proportional to 3,117.40, 4,676.10 and 2,939.20

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Solution

The fourth proportional to 3,117.40, 4,676.10 and 2,939.20 is: 4,408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.40 : 4,676.10 = 2,939.20 : x
  2. Step 2: Convert to fraction form
    3,117.40/4,676.10 = 2,939.20/x
  3. Step 3: Cross multiply
    3,117.40x = 4,676.10 × 2,939.20
  4. Step 4: Simplify right side
    3,117.40x = 13,743,993.12
  5. Step 5: Solve for x
    x = 13,743,993.12/3,117.40
  6. Step 6: Final answer
    x = 4,408.80

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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.