Home / 1,993.20-2,990.88-1,263.12

Finding the Fourth Proportional to 1,993.20, 2,990.88 and 1,263.12

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Solution

The fourth proportional to 1,993.20, 2,990.88 and 1,263.12 is: 1,895.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.20 : 2,990.88 = 1,263.12 : x
  2. Step 2: Convert to fraction form
    1,993.20/2,990.88 = 1,263.12/x
  3. Step 3: Cross multiply
    1,993.20x = 2,990.88 × 1,263.12
  4. Step 4: Simplify right side
    1,993.20x = 3,777,840.35
  5. Step 5: Solve for x
    x = 3,777,840.35/1,993.20
  6. Step 6: Final answer
    x = 1,895.36

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1.5x scale

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.