Home / 3,123.21-4,684.99-1,274.28

Finding the Fourth Proportional to 3,123.21, 4,684.99 and 1,274.28

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Solution

The fourth proportional to 3,123.21, 4,684.99 and 1,274.28 is: 1,911.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.21 : 4,684.99 = 1,274.28 : x
  2. Step 2: Convert to fraction form
    3,123.21/4,684.99 = 1,274.28/x
  3. Step 3: Cross multiply
    3,123.21x = 4,684.99 × 1,274.28
  4. Step 4: Simplify right side
    3,123.21x = 5,969,997.05
  5. Step 5: Solve for x
    x = 5,969,997.05/3,123.21
  6. Step 6: Final answer
    x = 1,911.50

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Half scale
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Double scale
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Similar ratio
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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.