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Finding the Fourth Proportional to 863.04, 1,291.68 and 620.04

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Solution

The fourth proportional to 863.04, 1,291.68 and 620.04 is: 927.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.04 : 1,291.68 = 620.04 : x
  2. Step 2: Convert to fraction form
    863.04/1,291.68 = 620.04/x
  3. Step 3: Cross multiply
    863.04x = 1,291.68 × 620.04
  4. Step 4: Simplify right side
    863.04x = 800,893.27
  5. Step 5: Solve for x
    x = 800,893.27/863.04
  6. Step 6: Final answer
    x = 927.99

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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.