Home / 3,121.10-4,680.26-929.96

Finding the Fourth Proportional to 3,121.10, 4,680.26 and 929.96

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Solution

The fourth proportional to 3,121.10, 4,680.26 and 929.96 is: 1,394.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.10 : 4,680.26 = 929.96 : x
  2. Step 2: Convert to fraction form
    3,121.10/4,680.26 = 929.96/x
  3. Step 3: Cross multiply
    3,121.10x = 4,680.26 × 929.96
  4. Step 4: Simplify right side
    3,121.10x = 4,352,454.59
  5. Step 5: Solve for x
    x = 4,352,454.59/3,121.10
  6. Step 6: Final answer
    x = 1,394.53

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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.