Home / 2,758.28-4,137.80-810.20

Finding the Fourth Proportional to 2,758.28, 4,137.80 and 810.20

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Solution

The fourth proportional to 2,758.28, 4,137.80 and 810.20 is: 1,215.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.28 : 4,137.80 = 810.20 : x
  2. Step 2: Convert to fraction form
    2,758.28/4,137.80 = 810.20/x
  3. Step 3: Cross multiply
    2,758.28x = 4,137.80 × 810.20
  4. Step 4: Simplify right side
    2,758.28x = 3,352,445.56
  5. Step 5: Solve for x
    x = 3,352,445.56/2,758.28
  6. Step 6: Final answer
    x = 1,215.41

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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.