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Finding the Fourth Proportional to 2,640.60, 3,959.28 and 995.76

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Solution

The fourth proportional to 2,640.60, 3,959.28 and 995.76 is: 1,493.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.60 : 3,959.28 = 995.76 : x
  2. Step 2: Convert to fraction form
    2,640.60/3,959.28 = 995.76/x
  3. Step 3: Cross multiply
    2,640.60x = 3,959.28 × 995.76
  4. Step 4: Simplify right side
    2,640.60x = 3,942,492.65
  5. Step 5: Solve for x
    x = 3,942,492.65/2,640.60
  6. Step 6: Final answer
    x = 1,493.03

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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.