Home / 1,989.10-2,745.28-1,203.58

Finding the Fourth Proportional to 1,989.10, 2,745.28 and 1,203.58

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Solution

The fourth proportional to 1,989.10, 2,745.28 and 1,203.58 is: 1,661.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.10 : 2,745.28 = 1,203.58 : x
  2. Step 2: Convert to fraction form
    1,989.10/2,745.28 = 1,203.58/x
  3. Step 3: Cross multiply
    1,989.10x = 2,745.28 × 1,203.58
  4. Step 4: Simplify right side
    1,989.10x = 3,304,164.10
  5. Step 5: Solve for x
    x = 3,304,164.10/1,989.10
  6. Step 6: Final answer
    x = 1,661.14

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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.