Home / 3,118.80-4,673.40-2,629.20

Finding the Fourth Proportional to 3,118.80, 4,673.40 and 2,629.20

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Solution

The fourth proportional to 3,118.80, 4,673.40 and 2,629.20 is: 3,939.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.80 : 4,673.40 = 2,629.20 : x
  2. Step 2: Convert to fraction form
    3,118.80/4,673.40 = 2,629.20/x
  3. Step 3: Cross multiply
    3,118.80x = 4,673.40 × 2,629.20
  4. Step 4: Simplify right side
    3,118.80x = 12,287,303.28
  5. Step 5: Solve for x
    x = 12,287,303.28/3,118.80
  6. Step 6: Final answer
    x = 3,939.75

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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.