Home / 1,990.32-2,748.60-1,672.44

Finding the Fourth Proportional to 1,990.32, 2,748.60 and 1,672.44

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Solution

The fourth proportional to 1,990.32, 2,748.60 and 1,672.44 is: 2,309.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.32 : 2,748.60 = 1,672.44 : x
  2. Step 2: Convert to fraction form
    1,990.32/2,748.60 = 1,672.44/x
  3. Step 3: Cross multiply
    1,990.32x = 2,748.60 × 1,672.44
  4. Step 4: Simplify right side
    1,990.32x = 4,596,868.58
  5. Step 5: Solve for x
    x = 4,596,868.58/1,990.32
  6. Step 6: Final answer
    x = 2,309.61

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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.