Home / 3,121.03-4,679.20-1,888.19

Finding the Fourth Proportional to 3,121.03, 4,679.20 and 1,888.19

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Solution

The fourth proportional to 3,121.03, 4,679.20 and 1,888.19 is: 2,830.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.03 : 4,679.20 = 1,888.19 : x
  2. Step 2: Convert to fraction form
    3,121.03/4,679.20 = 1,888.19/x
  3. Step 3: Cross multiply
    3,121.03x = 4,679.20 × 1,888.19
  4. Step 4: Simplify right side
    3,121.03x = 8,835,185.81
  5. Step 5: Solve for x
    x = 8,835,185.81/3,121.03
  6. Step 6: Final answer
    x = 2,830.86

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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.