Home / 3,139.85-4,709.63-1,290.51

Finding the Fourth Proportional to 3,139.85, 4,709.63 and 1,290.51

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Solution

The fourth proportional to 3,139.85, 4,709.63 and 1,290.51 is: 1,935.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.85 : 4,709.63 = 1,290.51 : x
  2. Step 2: Convert to fraction form
    3,139.85/4,709.63 = 1,290.51/x
  3. Step 3: Cross multiply
    3,139.85x = 4,709.63 × 1,290.51
  4. Step 4: Simplify right side
    3,139.85x = 6,077,824.61
  5. Step 5: Solve for x
    x = 6,077,824.61/3,139.85
  6. Step 6: Final answer
    x = 1,935.71

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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.