Home / 1,985.24-2,739.42-1,188.41

Finding the Fourth Proportional to 1,985.24, 2,739.42 and 1,188.41

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Solution

The fourth proportional to 1,985.24, 2,739.42 and 1,188.41 is: 1,639.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.24 : 2,739.42 = 1,188.41 : x
  2. Step 2: Convert to fraction form
    1,985.24/2,739.42 = 1,188.41/x
  3. Step 3: Cross multiply
    1,985.24x = 2,739.42 × 1,188.41
  4. Step 4: Simplify right side
    1,985.24x = 3,255,540.43
  5. Step 5: Solve for x
    x = 3,255,540.43/1,985.24
  6. Step 6: Final answer
    x = 1,639.87

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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.