Home / 1,980.09-2,972.87-1,006.86

Finding the Fourth Proportional to 1,980.09, 2,972.87 and 1,006.86

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Solution

The fourth proportional to 1,980.09, 2,972.87 and 1,006.86 is: 1,511.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.09 : 2,972.87 = 1,006.86 : x
  2. Step 2: Convert to fraction form
    1,980.09/2,972.87 = 1,006.86/x
  3. Step 3: Cross multiply
    1,980.09x = 2,972.87 × 1,006.86
  4. Step 4: Simplify right side
    1,980.09x = 2,993,258.85
  5. Step 5: Solve for x
    x = 2,993,258.85/1,980.09
  6. Step 6: Final answer
    x = 1,511.68

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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.