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Finding the Fourth Proportional to 3,539.79, 5,307.36 and 1,982.09

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Solution

The fourth proportional to 3,539.79, 5,307.36 and 1,982.09 is: 2,971.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,539.79 : 5,307.36 = 1,982.09 : x
  2. Step 2: Convert to fraction form
    3,539.79/5,307.36 = 1,982.09/x
  3. Step 3: Cross multiply
    3,539.79x = 5,307.36 × 1,982.09
  4. Step 4: Simplify right side
    3,539.79x = 10,519,671.02
  5. Step 5: Solve for x
    x = 10,519,671.02/3,539.79
  6. Step 6: Final answer
    x = 2,971.83

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Similar ratio
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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.