Home / 2,079.40-3,118.26-780.16

Finding the Fourth Proportional to 2,079.40, 3,118.26 and 780.16

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Solution

The fourth proportional to 2,079.40, 3,118.26 and 780.16 is: 1,169.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.40 : 3,118.26 = 780.16 : x
  2. Step 2: Convert to fraction form
    2,079.40/3,118.26 = 780.16/x
  3. Step 3: Cross multiply
    2,079.40x = 3,118.26 × 780.16
  4. Step 4: Simplify right side
    2,079.40x = 2,432,741.72
  5. Step 5: Solve for x
    x = 2,432,741.72/2,079.40
  6. Step 6: Final answer
    x = 1,169.92

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1.5x scale

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.