Home / 2,780.72-3,837.29-1,661.39

Finding the Fourth Proportional to 2,780.72, 3,837.29 and 1,661.39

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Solution

The fourth proportional to 2,780.72, 3,837.29 and 1,661.39 is: 2,292.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.72 : 3,837.29 = 1,661.39 : x
  2. Step 2: Convert to fraction form
    2,780.72/3,837.29 = 1,661.39/x
  3. Step 3: Cross multiply
    2,780.72x = 3,837.29 × 1,661.39
  4. Step 4: Simplify right side
    2,780.72x = 6,375,248.98
  5. Step 5: Solve for x
    x = 6,375,248.98/2,780.72
  6. Step 6: Final answer
    x = 2,292.67

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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.