Home / 3,985.53-5,979.20-1,212.60

Finding the Fourth Proportional to 3,985.53, 5,979.20 and 1,212.60

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Solution

The fourth proportional to 3,985.53, 5,979.20 and 1,212.60 is: 1,819.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.53 : 5,979.20 = 1,212.60 : x
  2. Step 2: Convert to fraction form
    3,985.53/5,979.20 = 1,212.60/x
  3. Step 3: Cross multiply
    3,985.53x = 5,979.20 × 1,212.60
  4. Step 4: Simplify right side
    3,985.53x = 7,250,355.77
  5. Step 5: Solve for x
    x = 7,250,355.77/3,985.53
  6. Step 6: Final answer
    x = 1,819.17

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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.