Home / 1,993.32-2,987.10-1,125.80

Finding the Fourth Proportional to 1,993.32, 2,987.10 and 1,125.80

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Solution

The fourth proportional to 1,993.32, 2,987.10 and 1,125.80 is: 1,687.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.32 : 2,987.10 = 1,125.80 : x
  2. Step 2: Convert to fraction form
    1,993.32/2,987.10 = 1,125.80/x
  3. Step 3: Cross multiply
    1,993.32x = 2,987.10 × 1,125.80
  4. Step 4: Simplify right side
    1,993.32x = 3,362,877.18
  5. Step 5: Solve for x
    x = 3,362,877.18/1,993.32
  6. Step 6: Final answer
    x = 1,687.07

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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.