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Finding the Fourth Proportional to 2,679.85, 4,020.31 and 949.69

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Solution

The fourth proportional to 2,679.85, 4,020.31 and 949.69 is: 1,424.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.85 : 4,020.31 = 949.69 : x
  2. Step 2: Convert to fraction form
    2,679.85/4,020.31 = 949.69/x
  3. Step 3: Cross multiply
    2,679.85x = 4,020.31 × 949.69
  4. Step 4: Simplify right side
    2,679.85x = 3,818,048.20
  5. Step 5: Solve for x
    x = 3,818,048.20/2,679.85
  6. Step 6: Final answer
    x = 1,424.72

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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.