Home / 1,989.61-2,745.55-1,150.35

Finding the Fourth Proportional to 1,989.61, 2,745.55 and 1,150.35

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Solution

The fourth proportional to 1,989.61, 2,745.55 and 1,150.35 is: 1,587.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.61 : 2,745.55 = 1,150.35 : x
  2. Step 2: Convert to fraction form
    1,989.61/2,745.55 = 1,150.35/x
  3. Step 3: Cross multiply
    1,989.61x = 2,745.55 × 1,150.35
  4. Step 4: Simplify right side
    1,989.61x = 3,158,323.96
  5. Step 5: Solve for x
    x = 3,158,323.96/1,989.61
  6. Step 6: Final answer
    x = 1,587.41

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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.