Home / 1,986.12-2,974.30-1,637.32

Finding the Fourth Proportional to 1,986.12, 2,974.30 and 1,637.32

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Solution

The fourth proportional to 1,986.12, 2,974.30 and 1,637.32 is: 2,451.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.12 : 2,974.30 = 1,637.32 : x
  2. Step 2: Convert to fraction form
    1,986.12/2,974.30 = 1,637.32/x
  3. Step 3: Cross multiply
    1,986.12x = 2,974.30 × 1,637.32
  4. Step 4: Simplify right side
    1,986.12x = 4,869,880.88
  5. Step 5: Solve for x
    x = 4,869,880.88/1,986.12
  6. Step 6: Final answer
    x = 2,451.96

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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.