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Finding the Fourth Proportional to 2,072.63, 3,108.95 and 611.67

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Solution

The fourth proportional to 2,072.63, 3,108.95 and 611.67 is: 917.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,072.63 : 3,108.95 = 611.67 : x
  2. Step 2: Convert to fraction form
    2,072.63/3,108.95 = 611.67/x
  3. Step 3: Cross multiply
    2,072.63x = 3,108.95 × 611.67
  4. Step 4: Simplify right side
    2,072.63x = 1,901,659.22
  5. Step 5: Solve for x
    x = 1,901,659.22/2,072.63
  6. Step 6: Final answer
    x = 917.51

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Similar ratio
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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.