Home / 1,989.34-2,745.40-1,150.20

Finding the Fourth Proportional to 1,989.34, 2,745.40 and 1,150.20

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Solution

The fourth proportional to 1,989.34, 2,745.40 and 1,150.20 is: 1,587.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.34 : 2,745.40 = 1,150.20 : x
  2. Step 2: Convert to fraction form
    1,989.34/2,745.40 = 1,150.20/x
  3. Step 3: Cross multiply
    1,989.34x = 2,745.40 × 1,150.20
  4. Step 4: Simplify right side
    1,989.34x = 3,157,759.08
  5. Step 5: Solve for x
    x = 3,157,759.08/1,989.34
  6. Step 6: Final answer
    x = 1,587.34

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1.5x scale

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.