Home / 2,279.20-3,416.56-1,238.28

Finding the Fourth Proportional to 2,279.20, 3,416.56 and 1,238.28

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Solution

The fourth proportional to 2,279.20, 3,416.56 and 1,238.28 is: 1,856.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,279.20 : 3,416.56 = 1,238.28 : x
  2. Step 2: Convert to fraction form
    2,279.20/3,416.56 = 1,238.28/x
  3. Step 3: Cross multiply
    2,279.20x = 3,416.56 × 1,238.28
  4. Step 4: Simplify right side
    2,279.20x = 4,230,657.92
  5. Step 5: Solve for x
    x = 4,230,657.92/2,279.20
  6. Step 6: Final answer
    x = 1,856.20

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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.