Home / 3,015.45-4,160.84-1,689.15

Finding the Fourth Proportional to 3,015.45, 4,160.84 and 1,689.15

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Solution

The fourth proportional to 3,015.45, 4,160.84 and 1,689.15 is: 2,330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.45 : 4,160.84 = 1,689.15 : x
  2. Step 2: Convert to fraction form
    3,015.45/4,160.84 = 1,689.15/x
  3. Step 3: Cross multiply
    3,015.45x = 4,160.84 × 1,689.15
  4. Step 4: Simplify right side
    3,015.45x = 7,028,274.44
  5. Step 5: Solve for x
    x = 7,028,274.44/3,015.45
  6. Step 6: Final answer
    x = 2,330.75

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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.