Home / 1,980.26-2,970.42-1,518.86

Finding the Fourth Proportional to 1,980.26, 2,970.42 and 1,518.86

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Solution

The fourth proportional to 1,980.26, 2,970.42 and 1,518.86 is: 2,278.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.26 : 2,970.42 = 1,518.86 : x
  2. Step 2: Convert to fraction form
    1,980.26/2,970.42 = 1,518.86/x
  3. Step 3: Cross multiply
    1,980.26x = 2,970.42 × 1,518.86
  4. Step 4: Simplify right side
    1,980.26x = 4,511,652.12
  5. Step 5: Solve for x
    x = 4,511,652.12/1,980.26
  6. Step 6: Final answer
    x = 2,278.31

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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.