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Finding the Fourth Proportional to 862.24, 1,286.28 and 832.96

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Solution

The fourth proportional to 862.24, 1,286.28 and 832.96 is: 1,242.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.24 : 1,286.28 = 832.96 : x
  2. Step 2: Convert to fraction form
    862.24/1,286.28 = 832.96/x
  3. Step 3: Cross multiply
    862.24x = 1,286.28 × 832.96
  4. Step 4: Simplify right side
    862.24x = 1,071,419.79
  5. Step 5: Solve for x
    x = 1,071,419.79/862.24
  6. Step 6: Final answer
    x = 1,242.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.