Home / 4,919.09-7,378.43-1,221.23

Finding the Fourth Proportional to 4,919.09, 7,378.43 and 1,221.23

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Solution

The fourth proportional to 4,919.09, 7,378.43 and 1,221.23 is: 1,831.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.09 : 7,378.43 = 1,221.23 : x
  2. Step 2: Convert to fraction form
    4,919.09/7,378.43 = 1,221.23/x
  3. Step 3: Cross multiply
    4,919.09x = 7,378.43 × 1,221.23
  4. Step 4: Simplify right side
    4,919.09x = 9,010,772.41
  5. Step 5: Solve for x
    x = 9,010,772.41/4,919.09
  6. Step 6: Final answer
    x = 1,831.80

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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.