Home / 2,319.72-3,479.99-1,279.28

Finding the Fourth Proportional to 2,319.72, 3,479.99 and 1,279.28

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Solution

The fourth proportional to 2,319.72, 3,479.99 and 1,279.28 is: 1,919.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,319.72 : 3,479.99 = 1,279.28 : x
  2. Step 2: Convert to fraction form
    2,319.72/3,479.99 = 1,279.28/x
  3. Step 3: Cross multiply
    2,319.72x = 3,479.99 × 1,279.28
  4. Step 4: Simplify right side
    2,319.72x = 4,451,857.81
  5. Step 5: Solve for x
    x = 4,451,857.81/2,319.72
  6. Step 6: Final answer
    x = 1,919.14

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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.