Home / 1,980.15-2,964.90-1,360.80

Finding the Fourth Proportional to 1,980.15, 2,964.90 and 1,360.80

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Solution

The fourth proportional to 1,980.15, 2,964.90 and 1,360.80 is: 2,037.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.15 : 2,964.90 = 1,360.80 : x
  2. Step 2: Convert to fraction form
    1,980.15/2,964.90 = 1,360.80/x
  3. Step 3: Cross multiply
    1,980.15x = 2,964.90 × 1,360.80
  4. Step 4: Simplify right side
    1,980.15x = 4,034,641.02
  5. Step 5: Solve for x
    x = 4,034,641.02/1,980.15
  6. Step 6: Final answer
    x = 2,037.55

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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.