Home / 2,782.20-4,173.30-1,138.20

Finding the Fourth Proportional to 2,782.20, 4,173.30 and 1,138.20

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Solution

The fourth proportional to 2,782.20, 4,173.30 and 1,138.20 is: 1,707.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.20 : 4,173.30 = 1,138.20 : x
  2. Step 2: Convert to fraction form
    2,782.20/4,173.30 = 1,138.20/x
  3. Step 3: Cross multiply
    2,782.20x = 4,173.30 × 1,138.20
  4. Step 4: Simplify right side
    2,782.20x = 4,750,050.06
  5. Step 5: Solve for x
    x = 4,750,050.06/2,782.20
  6. Step 6: Final answer
    x = 1,707.30

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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.