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Finding the Fourth Proportional to 832.92, 1,247.76 and 788.64

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Solution

The fourth proportional to 832.92, 1,247.76 and 788.64 is: 1,181.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.92 : 1,247.76 = 788.64 : x
  2. Step 2: Convert to fraction form
    832.92/1,247.76 = 788.64/x
  3. Step 3: Cross multiply
    832.92x = 1,247.76 × 788.64
  4. Step 4: Simplify right side
    832.92x = 984,033.45
  5. Step 5: Solve for x
    x = 984,033.45/832.92
  6. Step 6: Final answer
    x = 1,181.43

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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.