Home / 3,175.20-4,784.40-2,980.80

Finding the Fourth Proportional to 3,175.20, 4,784.40 and 2,980.80

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Solution

The fourth proportional to 3,175.20, 4,784.40 and 2,980.80 is: 4,491.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,175.20 : 4,784.40 = 2,980.80 : x
  2. Step 2: Convert to fraction form
    3,175.20/4,784.40 = 2,980.80/x
  3. Step 3: Cross multiply
    3,175.20x = 4,784.40 × 2,980.80
  4. Step 4: Simplify right side
    3,175.20x = 14,261,339.52
  5. Step 5: Solve for x
    x = 14,261,339.52/3,175.20
  6. Step 6: Final answer
    x = 4,491.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.