Home / 2,077.85-3,116.77-1,211.55

Finding the Fourth Proportional to 2,077.85, 3,116.77 and 1,211.55

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Solution

The fourth proportional to 2,077.85, 3,116.77 and 1,211.55 is: 1,817.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,077.85 : 3,116.77 = 1,211.55 : x
  2. Step 2: Convert to fraction form
    2,077.85/3,116.77 = 1,211.55/x
  3. Step 3: Cross multiply
    2,077.85x = 3,116.77 × 1,211.55
  4. Step 4: Simplify right side
    2,077.85x = 3,776,122.69
  5. Step 5: Solve for x
    x = 3,776,122.69/2,077.85
  6. Step 6: Final answer
    x = 1,817.32

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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.