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Finding the Fourth Proportional to 3,208.76, 4,429.23 and 1,949.30

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Solution

The fourth proportional to 3,208.76, 4,429.23 and 1,949.30 is: 2,690.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,208.76 : 4,429.23 = 1,949.30 : x
  2. Step 2: Convert to fraction form
    3,208.76/4,429.23 = 1,949.30/x
  3. Step 3: Cross multiply
    3,208.76x = 4,429.23 × 1,949.30
  4. Step 4: Simplify right side
    3,208.76x = 8,633,898.04
  5. Step 5: Solve for x
    x = 8,633,898.04/3,208.76
  6. Step 6: Final answer
    x = 2,690.73

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Half scale
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Double scale
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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.