Home / 1,550.39-2,138.60-961.25

Finding the Fourth Proportional to 1,550.39, 2,138.60 and 961.25

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Solution

The fourth proportional to 1,550.39, 2,138.60 and 961.25 is: 1,325.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,550.39 : 2,138.60 = 961.25 : x
  2. Step 2: Convert to fraction form
    1,550.39/2,138.60 = 961.25/x
  3. Step 3: Cross multiply
    1,550.39x = 2,138.60 × 961.25
  4. Step 4: Simplify right side
    1,550.39x = 2,055,720.96
  5. Step 5: Solve for x
    x = 2,055,720.96/1,550.39
  6. Step 6: Final answer
    x = 1,325.94

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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.