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Finding the Fourth Proportional to 3,829.59, 5,745.06 and 1,980.20

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Solution

The fourth proportional to 3,829.59, 5,745.06 and 1,980.20 is: 2,970.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,829.59 : 5,745.06 = 1,980.20 : x
  2. Step 2: Convert to fraction form
    3,829.59/5,745.06 = 1,980.20/x
  3. Step 3: Cross multiply
    3,829.59x = 5,745.06 × 1,980.20
  4. Step 4: Simplify right side
    3,829.59x = 11,376,382.17
  5. Step 5: Solve for x
    x = 11,376,382.17/3,829.59
  6. Step 6: Final answer
    x = 2,970.65

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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.