Home / 2,780.53-3,836.56-1,661.06

Finding the Fourth Proportional to 2,780.53, 3,836.56 and 1,661.06

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Solution

The fourth proportional to 2,780.53, 3,836.56 and 1,661.06 is: 2,291.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.53 : 3,836.56 = 1,661.06 : x
  2. Step 2: Convert to fraction form
    2,780.53/3,836.56 = 1,661.06/x
  3. Step 3: Cross multiply
    2,780.53x = 3,836.56 × 1,661.06
  4. Step 4: Simplify right side
    2,780.53x = 6,372,756.35
  5. Step 5: Solve for x
    x = 6,372,756.35/2,780.53
  6. Step 6: Final answer
    x = 2,291.92

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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.