Home / 2,153.05-3,212.35-1,919.17

Finding the Fourth Proportional to 2,153.05, 3,212.35 and 1,919.17

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Solution

The fourth proportional to 2,153.05, 3,212.35 and 1,919.17 is: 2,863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.05 : 3,212.35 = 1,919.17 : x
  2. Step 2: Convert to fraction form
    2,153.05/3,212.35 = 1,919.17/x
  3. Step 3: Cross multiply
    2,153.05x = 3,212.35 × 1,919.17
  4. Step 4: Simplify right side
    2,153.05x = 6,165,045.75
  5. Step 5: Solve for x
    x = 6,165,045.75/2,153.05
  6. Step 6: Final answer
    x = 2,863.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.