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Finding the Fourth Proportional to 3,101.67, 4,276.34 and 1,980.74

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Solution

The fourth proportional to 3,101.67, 4,276.34 and 1,980.74 is: 2,730.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,101.67 : 4,276.34 = 1,980.74 : x
  2. Step 2: Convert to fraction form
    3,101.67/4,276.34 = 1,980.74/x
  3. Step 3: Cross multiply
    3,101.67x = 4,276.34 × 1,980.74
  4. Step 4: Simplify right side
    3,101.67x = 8,470,286.41
  5. Step 5: Solve for x
    x = 8,470,286.41/3,101.67
  6. Step 6: Final answer
    x = 2,730.88

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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.