Home / 4,919.42-7,378.94-1,221.57

Finding the Fourth Proportional to 4,919.42, 7,378.94 and 1,221.57

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Solution

The fourth proportional to 4,919.42, 7,378.94 and 1,221.57 is: 1,832.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.42 : 7,378.94 = 1,221.57 : x
  2. Step 2: Convert to fraction form
    4,919.42/7,378.94 = 1,221.57/x
  3. Step 3: Cross multiply
    4,919.42x = 7,378.94 × 1,221.57
  4. Step 4: Simplify right side
    4,919.42x = 9,013,885.63
  5. Step 5: Solve for x
    x = 9,013,885.63/4,919.42
  6. Step 6: Final answer
    x = 1,832.31

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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.