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Finding the Fourth Proportional to 828.44, 1,143.44 and 496.76

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Solution

The fourth proportional to 828.44, 1,143.44 and 496.76 is: 685.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.44 : 1,143.44 = 496.76 : x
  2. Step 2: Convert to fraction form
    828.44/1,143.44 = 496.76/x
  3. Step 3: Cross multiply
    828.44x = 1,143.44 × 496.76
  4. Step 4: Simplify right side
    828.44x = 568,015.25
  5. Step 5: Solve for x
    x = 568,015.25/828.44
  6. Step 6: Final answer
    x = 685.64

Related Problems

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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.