Home / 1,980.20-2,956.85-1,772.43

Finding the Fourth Proportional to 1,980.20, 2,956.85 and 1,772.43

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Solution

The fourth proportional to 1,980.20, 2,956.85 and 1,772.43 is: 2,646.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.20 : 2,956.85 = 1,772.43 : x
  2. Step 2: Convert to fraction form
    1,980.20/2,956.85 = 1,772.43/x
  3. Step 3: Cross multiply
    1,980.20x = 2,956.85 × 1,772.43
  4. Step 4: Simplify right side
    1,980.20x = 5,240,800.78
  5. Step 5: Solve for x
    x = 5,240,800.78/1,980.20
  6. Step 6: Final answer
    x = 2,646.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.