Home / 3,121.78-4,684.73-1,366.72

Finding the Fourth Proportional to 3,121.78, 4,684.73 and 1,366.72

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Solution

The fourth proportional to 3,121.78, 4,684.73 and 1,366.72 is: 2,050.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.78 : 4,684.73 = 1,366.72 : x
  2. Step 2: Convert to fraction form
    3,121.78/4,684.73 = 1,366.72/x
  3. Step 3: Cross multiply
    3,121.78x = 4,684.73 × 1,366.72
  4. Step 4: Simplify right side
    3,121.78x = 6,402,714.19
  5. Step 5: Solve for x
    x = 6,402,714.19/3,121.78
  6. Step 6: Final answer
    x = 2,050.98

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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.