Home / 3,121.93-4,678.85-1,270.88

Finding the Fourth Proportional to 3,121.93, 4,678.85 and 1,270.88

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Solution

The fourth proportional to 3,121.93, 4,678.85 and 1,270.88 is: 1,904.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.93 : 4,678.85 = 1,270.88 : x
  2. Step 2: Convert to fraction form
    3,121.93/4,678.85 = 1,270.88/x
  3. Step 3: Cross multiply
    3,121.93x = 4,678.85 × 1,270.88
  4. Step 4: Simplify right side
    3,121.93x = 5,946,236.67
  5. Step 5: Solve for x
    x = 5,946,236.67/3,121.93
  6. Step 6: Final answer
    x = 1,904.67

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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.