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Finding the Fourth Proportional to 2,624.25, 3,936.39 and 676.32

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Solution

The fourth proportional to 2,624.25, 3,936.39 and 676.32 is: 1,014.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,624.25 : 3,936.39 = 676.32 : x
  2. Step 2: Convert to fraction form
    2,624.25/3,936.39 = 676.32/x
  3. Step 3: Cross multiply
    2,624.25x = 3,936.39 × 676.32
  4. Step 4: Simplify right side
    2,624.25x = 2,662,259.28
  5. Step 5: Solve for x
    x = 2,662,259.28/2,624.25
  6. Step 6: Final answer
    x = 1,014.48

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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.