Home / 1,985.21-2,739.83-1,355.54

Finding the Fourth Proportional to 1,985.21, 2,739.83 and 1,355.54

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Solution

The fourth proportional to 1,985.21, 2,739.83 and 1,355.54 is: 1,870.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.21 : 2,739.83 = 1,355.54 : x
  2. Step 2: Convert to fraction form
    1,985.21/2,739.83 = 1,355.54/x
  3. Step 3: Cross multiply
    1,985.21x = 2,739.83 × 1,355.54
  4. Step 4: Simplify right side
    1,985.21x = 3,713,928.68
  5. Step 5: Solve for x
    x = 3,713,928.68/1,985.21
  6. Step 6: Final answer
    x = 1,870.80

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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.