Home / 3,121.43-4,306.61-1,776.95

Finding the Fourth Proportional to 3,121.43, 4,306.61 and 1,776.95

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Solution

The fourth proportional to 3,121.43, 4,306.61 and 1,776.95 is: 2,451.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.43 : 4,306.61 = 1,776.95 : x
  2. Step 2: Convert to fraction form
    3,121.43/4,306.61 = 1,776.95/x
  3. Step 3: Cross multiply
    3,121.43x = 4,306.61 × 1,776.95
  4. Step 4: Simplify right side
    3,121.43x = 7,652,613.55
  5. Step 5: Solve for x
    x = 7,652,613.55/3,121.43
  6. Step 6: Final answer
    x = 2,451.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.