Home / 2,980.28-4,112.46-1,653.72

Finding the Fourth Proportional to 2,980.28, 4,112.46 and 1,653.72

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Solution

The fourth proportional to 2,980.28, 4,112.46 and 1,653.72 is: 2,281.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.28 : 4,112.46 = 1,653.72 : x
  2. Step 2: Convert to fraction form
    2,980.28/4,112.46 = 1,653.72/x
  3. Step 3: Cross multiply
    2,980.28x = 4,112.46 × 1,653.72
  4. Step 4: Simplify right side
    2,980.28x = 6,800,857.35
  5. Step 5: Solve for x
    x = 6,800,857.35/2,980.28
  6. Step 6: Final answer
    x = 2,281.95

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1.5x scale

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.