Home / 2,790.60-4,186.50-1,310.70

Finding the Fourth Proportional to 2,790.60, 4,186.50 and 1,310.70

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Solution

The fourth proportional to 2,790.60, 4,186.50 and 1,310.70 is: 1,966.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.60 : 4,186.50 = 1,310.70 : x
  2. Step 2: Convert to fraction form
    2,790.60/4,186.50 = 1,310.70/x
  3. Step 3: Cross multiply
    2,790.60x = 4,186.50 × 1,310.70
  4. Step 4: Simplify right side
    2,790.60x = 5,487,245.55
  5. Step 5: Solve for x
    x = 5,487,245.55/2,790.60
  6. Step 6: Final answer
    x = 1,966.33

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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.