Home / 2,981.70-4,115.25-1,919.16

Finding the Fourth Proportional to 2,981.70, 4,115.25 and 1,919.16

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Solution

The fourth proportional to 2,981.70, 4,115.25 and 1,919.16 is: 2,648.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.70 : 4,115.25 = 1,919.16 : x
  2. Step 2: Convert to fraction form
    2,981.70/4,115.25 = 1,919.16/x
  3. Step 3: Cross multiply
    2,981.70x = 4,115.25 × 1,919.16
  4. Step 4: Simplify right side
    2,981.70x = 7,897,823.19
  5. Step 5: Solve for x
    x = 7,897,823.19/2,981.70
  6. Step 6: Final answer
    x = 2,648.77

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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.