Home / 2,828.28-3,900.65-1,820.15

Finding the Fourth Proportional to 2,828.28, 3,900.65 and 1,820.15

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Solution

The fourth proportional to 2,828.28, 3,900.65 and 1,820.15 is: 2,510.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,828.28 : 3,900.65 = 1,820.15 : x
  2. Step 2: Convert to fraction form
    2,828.28/3,900.65 = 1,820.15/x
  3. Step 3: Cross multiply
    2,828.28x = 3,900.65 × 1,820.15
  4. Step 4: Simplify right side
    2,828.28x = 7,099,739.49
  5. Step 5: Solve for x
    x = 7,099,739.49/2,828.28
  6. Step 6: Final answer
    x = 2,510.27

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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.