Home / 2,918.97-4,378.32-727.71

Finding the Fourth Proportional to 2,918.97, 4,378.32 and 727.71

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Solution

The fourth proportional to 2,918.97, 4,378.32 and 727.71 is: 1,091.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.97 : 4,378.32 = 727.71 : x
  2. Step 2: Convert to fraction form
    2,918.97/4,378.32 = 727.71/x
  3. Step 3: Cross multiply
    2,918.97x = 4,378.32 × 727.71
  4. Step 4: Simplify right side
    2,918.97x = 3,186,147.25
  5. Step 5: Solve for x
    x = 3,186,147.25/2,918.97
  6. Step 6: Final answer
    x = 1,091.53

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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.