Home / 2,079.32-3,117.60-780.04

Finding the Fourth Proportional to 2,079.32, 3,117.60 and 780.04

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Solution

The fourth proportional to 2,079.32, 3,117.60 and 780.04 is: 1,169.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.32 : 3,117.60 = 780.04 : x
  2. Step 2: Convert to fraction form
    2,079.32/3,117.60 = 780.04/x
  3. Step 3: Cross multiply
    2,079.32x = 3,117.60 × 780.04
  4. Step 4: Simplify right side
    2,079.32x = 2,431,852.70
  5. Step 5: Solve for x
    x = 2,431,852.70/2,079.32
  6. Step 6: Final answer
    x = 1,169.54

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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.