Home / 1,279.12-1,919.22-1,163.74

Finding the Fourth Proportional to 1,279.12, 1,919.22 and 1,163.74

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Solution

The fourth proportional to 1,279.12, 1,919.22 and 1,163.74 is: 1,746.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.12 : 1,919.22 = 1,163.74 : x
  2. Step 2: Convert to fraction form
    1,279.12/1,919.22 = 1,163.74/x
  3. Step 3: Cross multiply
    1,279.12x = 1,919.22 × 1,163.74
  4. Step 4: Simplify right side
    1,279.12x = 2,233,457.67
  5. Step 5: Solve for x
    x = 2,233,457.67/1,279.12
  6. Step 6: Final answer
    x = 1,746.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.