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Finding the Fourth Proportional to 1,989.04, 2,745.04 and 1,150.08

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Solution

The fourth proportional to 1,989.04, 2,745.04 and 1,150.08 is: 1,587.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.04 : 2,745.04 = 1,150.08 : x
  2. Step 2: Convert to fraction form
    1,989.04/2,745.04 = 1,150.08/x
  3. Step 3: Cross multiply
    1,989.04x = 2,745.04 × 1,150.08
  4. Step 4: Simplify right side
    1,989.04x = 3,157,015.60
  5. Step 5: Solve for x
    x = 3,157,015.60/1,989.04
  6. Step 6: Final answer
    x = 1,587.21

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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.