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Finding the Fourth Proportional to 863.61, 1,294.95 and 343.34

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Solution

The fourth proportional to 863.61, 1,294.95 and 343.34 is: 514.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.61 : 1,294.95 = 343.34 : x
  2. Step 2: Convert to fraction form
    863.61/1,294.95 = 343.34/x
  3. Step 3: Cross multiply
    863.61x = 1,294.95 × 343.34
  4. Step 4: Simplify right side
    863.61x = 444,606.35
  5. Step 5: Solve for x
    x = 444,606.35/863.61
  6. Step 6: Final answer
    x = 514.83

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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.