Home / 2,780.56-3,834.84-2,190.16

Finding the Fourth Proportional to 2,780.56, 3,834.84 and 2,190.16

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Solution

The fourth proportional to 2,780.56, 3,834.84 and 2,190.16 is: 3,020.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.56 : 3,834.84 = 2,190.16 : x
  2. Step 2: Convert to fraction form
    2,780.56/3,834.84 = 2,190.16/x
  3. Step 3: Cross multiply
    2,780.56x = 3,834.84 × 2,190.16
  4. Step 4: Simplify right side
    2,780.56x = 8,398,913.17
  5. Step 5: Solve for x
    x = 8,398,913.17/2,780.56
  6. Step 6: Final answer
    x = 3,020.58

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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.