Home / 3,121.92-4,678.86-1,270.89

Finding the Fourth Proportional to 3,121.92, 4,678.86 and 1,270.89

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Solution

The fourth proportional to 3,121.92, 4,678.86 and 1,270.89 is: 1,904.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.92 : 4,678.86 = 1,270.89 : x
  2. Step 2: Convert to fraction form
    3,121.92/4,678.86 = 1,270.89/x
  3. Step 3: Cross multiply
    3,121.92x = 4,678.86 × 1,270.89
  4. Step 4: Simplify right side
    3,121.92x = 5,946,316.39
  5. Step 5: Solve for x
    x = 5,946,316.39/3,121.92
  6. Step 6: Final answer
    x = 1,904.70

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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.