Home / 2,859.19-3,945.75-1,680.02

Finding the Fourth Proportional to 2,859.19, 3,945.75 and 1,680.02

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Solution

The fourth proportional to 2,859.19, 3,945.75 and 1,680.02 is: 2,318.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,859.19 : 3,945.75 = 1,680.02 : x
  2. Step 2: Convert to fraction form
    2,859.19/3,945.75 = 1,680.02/x
  3. Step 3: Cross multiply
    2,859.19x = 3,945.75 × 1,680.02
  4. Step 4: Simplify right side
    2,859.19x = 6,628,938.92
  5. Step 5: Solve for x
    x = 6,628,938.92/2,859.19
  6. Step 6: Final answer
    x = 2,318.47

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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.