Home / 2,613.74-3,918.99-1,380.38

Finding the Fourth Proportional to 2,613.74, 3,918.99 and 1,380.38

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Solution

The fourth proportional to 2,613.74, 3,918.99 and 1,380.38 is: 2,069.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,613.74 : 3,918.99 = 1,380.38 : x
  2. Step 2: Convert to fraction form
    2,613.74/3,918.99 = 1,380.38/x
  3. Step 3: Cross multiply
    2,613.74x = 3,918.99 × 1,380.38
  4. Step 4: Simplify right side
    2,613.74x = 5,409,695.42
  5. Step 5: Solve for x
    x = 5,409,695.42/2,613.74
  6. Step 6: Final answer
    x = 2,069.71

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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.