Home / 4,919.28-7,378.90-1,221.44

Finding the Fourth Proportional to 4,919.28, 7,378.90 and 1,221.44

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Solution

The fourth proportional to 4,919.28, 7,378.90 and 1,221.44 is: 1,832.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.28 : 7,378.90 = 1,221.44 : x
  2. Step 2: Convert to fraction form
    4,919.28/7,378.90 = 1,221.44/x
  3. Step 3: Cross multiply
    4,919.28x = 7,378.90 × 1,221.44
  4. Step 4: Simplify right side
    4,919.28x = 9,012,883.62
  5. Step 5: Solve for x
    x = 9,012,883.62/4,919.28
  6. Step 6: Final answer
    x = 1,832.16

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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.