Home / 3,613.40-5,418.39-1,665.80

Finding the Fourth Proportional to 3,613.40, 5,418.39 and 1,665.80

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Solution

The fourth proportional to 3,613.40, 5,418.39 and 1,665.80 is: 2,497.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,613.40 : 5,418.39 = 1,665.80 : x
  2. Step 2: Convert to fraction form
    3,613.40/5,418.39 = 1,665.80/x
  3. Step 3: Cross multiply
    3,613.40x = 5,418.39 × 1,665.80
  4. Step 4: Simplify right side
    3,613.40x = 9,025,954.06
  5. Step 5: Solve for x
    x = 9,025,954.06/3,613.40
  6. Step 6: Final answer
    x = 2,497.91

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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.