Home / 2,859.36-3,946.69-1,680.81

Finding the Fourth Proportional to 2,859.36, 3,946.69 and 1,680.81

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Solution

The fourth proportional to 2,859.36, 3,946.69 and 1,680.81 is: 2,319.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.36 : 3,946.69 = 1,680.81 : x
  2. Step 2: Convert to fraction form
    2,859.36/3,946.69 = 1,680.81/x
  3. Step 3: Cross multiply
    2,859.36x = 3,946.69 × 1,680.81
  4. Step 4: Simplify right side
    2,859.36x = 6,633,636.02
  5. Step 5: Solve for x
    x = 6,633,636.02/2,859.36
  6. Step 6: Final answer
    x = 2,319.97

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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.