Home / 2,780.85-3,837.81-1,586.20

Finding the Fourth Proportional to 2,780.85, 3,837.81 and 1,586.20

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Solution

The fourth proportional to 2,780.85, 3,837.81 and 1,586.20 is: 2,189.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.85 : 3,837.81 = 1,586.20 : x
  2. Step 2: Convert to fraction form
    2,780.85/3,837.81 = 1,586.20/x
  3. Step 3: Cross multiply
    2,780.85x = 3,837.81 × 1,586.20
  4. Step 4: Simplify right side
    2,780.85x = 6,087,534.22
  5. Step 5: Solve for x
    x = 6,087,534.22/2,780.85
  6. Step 6: Final answer
    x = 2,189.09

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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.