Home / 1,919.41-2,647.69-1,328.92

Finding the Fourth Proportional to 1,919.41, 2,647.69 and 1,328.92

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Solution

The fourth proportional to 1,919.41, 2,647.69 and 1,328.92 is: 1,833.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.41 : 2,647.69 = 1,328.92 : x
  2. Step 2: Convert to fraction form
    1,919.41/2,647.69 = 1,328.92/x
  3. Step 3: Cross multiply
    1,919.41x = 2,647.69 × 1,328.92
  4. Step 4: Simplify right side
    1,919.41x = 3,518,568.19
  5. Step 5: Solve for x
    x = 3,518,568.19/1,919.41
  6. Step 6: Final answer
    x = 1,833.15

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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.