Home / 2,126.50-3,189.61-1,085.85

Finding the Fourth Proportional to 2,126.50, 3,189.61 and 1,085.85

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Solution

The fourth proportional to 2,126.50, 3,189.61 and 1,085.85 is: 1,628.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.50 : 3,189.61 = 1,085.85 : x
  2. Step 2: Convert to fraction form
    2,126.50/3,189.61 = 1,085.85/x
  3. Step 3: Cross multiply
    2,126.50x = 3,189.61 × 1,085.85
  4. Step 4: Simplify right side
    2,126.50x = 3,463,438.02
  5. Step 5: Solve for x
    x = 3,463,438.02/2,126.50
  6. Step 6: Final answer
    x = 1,628.70

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Double scale
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Similar ratio
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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.