Home / 2,828.77-3,899.86-2,385.90

Finding the Fourth Proportional to 2,828.77, 3,899.86 and 2,385.90

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Solution

The fourth proportional to 2,828.77, 3,899.86 and 2,385.90 is: 3,289.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,828.77 : 3,899.86 = 2,385.90 : x
  2. Step 2: Convert to fraction form
    2,828.77/3,899.86 = 2,385.90/x
  3. Step 3: Cross multiply
    2,828.77x = 3,899.86 × 2,385.90
  4. Step 4: Simplify right side
    2,828.77x = 9,304,675.97
  5. Step 5: Solve for x
    x = 9,304,675.97/2,828.77
  6. Step 6: Final answer
    x = 3,289.30

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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.