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Finding the Fourth Proportional to 3,551.99, 4,901.72 and 1,980.09

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Solution

The fourth proportional to 3,551.99, 4,901.72 and 1,980.09 is: 2,732.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,551.99 : 4,901.72 = 1,980.09 : x
  2. Step 2: Convert to fraction form
    3,551.99/4,901.72 = 1,980.09/x
  3. Step 3: Cross multiply
    3,551.99x = 4,901.72 × 1,980.09
  4. Step 4: Simplify right side
    3,551.99x = 9,705,836.85
  5. Step 5: Solve for x
    x = 9,705,836.85/3,551.99
  6. Step 6: Final answer
    x = 2,732.51

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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.