Home / 3,091.20-4,638.60-1,143.48

Finding the Fourth Proportional to 3,091.20, 4,638.60 and 1,143.48

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Solution

The fourth proportional to 3,091.20, 4,638.60 and 1,143.48 is: 1,715.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,091.20 : 4,638.60 = 1,143.48 : x
  2. Step 2: Convert to fraction form
    3,091.20/4,638.60 = 1,143.48/x
  3. Step 3: Cross multiply
    3,091.20x = 4,638.60 × 1,143.48
  4. Step 4: Simplify right side
    3,091.20x = 5,304,146.33
  5. Step 5: Solve for x
    x = 5,304,146.33/3,091.20
  6. Step 6: Final answer
    x = 1,715.89

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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.