Home / 2,187.45-3,279.45-1,091.25

Finding the Fourth Proportional to 2,187.45, 3,279.45 and 1,091.25

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Solution

The fourth proportional to 2,187.45, 3,279.45 and 1,091.25 is: 1,636.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.45 : 3,279.45 = 1,091.25 : x
  2. Step 2: Convert to fraction form
    2,187.45/3,279.45 = 1,091.25/x
  3. Step 3: Cross multiply
    2,187.45x = 3,279.45 × 1,091.25
  4. Step 4: Simplify right side
    2,187.45x = 3,578,699.81
  5. Step 5: Solve for x
    x = 3,578,699.81/2,187.45
  6. Step 6: Final answer
    x = 1,636.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.