Home / 2,830.20-3,905.40-1,571

Finding the Fourth Proportional to 2,830.20, 3,905.40 and 1,571

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Solution

The fourth proportional to 2,830.20, 3,905.40 and 1,571 is: 2,167.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.20 : 3,905.40 = 1,571 : x
  2. Step 2: Convert to fraction form
    2,830.20/3,905.40 = 1,571/x
  3. Step 3: Cross multiply
    2,830.20x = 3,905.40 × 1,571
  4. Step 4: Simplify right side
    2,830.20x = 6,135,383.40
  5. Step 5: Solve for x
    x = 6,135,383.40/2,830.20
  6. Step 6: Final answer
    x = 2,167.83

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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.