Home / 3,139.79-4,329.92-2,392.43

Finding the Fourth Proportional to 3,139.79, 4,329.92 and 2,392.43

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Solution

The fourth proportional to 3,139.79, 4,329.92 and 2,392.43 is: 3,299.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.79 : 4,329.92 = 2,392.43 : x
  2. Step 2: Convert to fraction form
    3,139.79/4,329.92 = 2,392.43/x
  3. Step 3: Cross multiply
    3,139.79x = 4,329.92 × 2,392.43
  4. Step 4: Simplify right side
    3,139.79x = 10,359,014.84
  5. Step 5: Solve for x
    x = 10,359,014.84/3,139.79
  6. Step 6: Final answer
    x = 3,299.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.