Home / 2,859.26-3,945.81-1,680.35

Finding the Fourth Proportional to 2,859.26, 3,945.81 and 1,680.35

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Solution

The fourth proportional to 2,859.26, 3,945.81 and 1,680.35 is: 2,318.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.26 : 3,945.81 = 1,680.35 : x
  2. Step 2: Convert to fraction form
    2,859.26/3,945.81 = 1,680.35/x
  3. Step 3: Cross multiply
    2,859.26x = 3,945.81 × 1,680.35
  4. Step 4: Simplify right side
    2,859.26x = 6,630,341.83
  5. Step 5: Solve for x
    x = 6,630,341.83/2,859.26
  6. Step 6: Final answer
    x = 2,318.90

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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.