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Finding the Fourth Proportional to 863.55, 1,294.47 and 655.38

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Solution

The fourth proportional to 863.55, 1,294.47 and 655.38 is: 982.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.55 : 1,294.47 = 655.38 : x
  2. Step 2: Convert to fraction form
    863.55/1,294.47 = 655.38/x
  3. Step 3: Cross multiply
    863.55x = 1,294.47 × 655.38
  4. Step 4: Simplify right side
    863.55x = 848,369.75
  5. Step 5: Solve for x
    x = 848,369.75/863.55
  6. Step 6: Final answer
    x = 982.42

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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.