Home / 3,127.60-4,691.94-1,279.72

Finding the Fourth Proportional to 3,127.60, 4,691.94 and 1,279.72

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Solution

The fourth proportional to 3,127.60, 4,691.94 and 1,279.72 is: 1,919.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.60 : 4,691.94 = 1,279.72 : x
  2. Step 2: Convert to fraction form
    3,127.60/4,691.94 = 1,279.72/x
  3. Step 3: Cross multiply
    3,127.60x = 4,691.94 × 1,279.72
  4. Step 4: Simplify right side
    3,127.60x = 6,004,369.46
  5. Step 5: Solve for x
    x = 6,004,369.46/3,127.60
  6. Step 6: Final answer
    x = 1,919.80

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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.