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Finding the Fourth Proportional to 579.76, 869.69 and 163.35

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Solution

The fourth proportional to 579.76, 869.69 and 163.35 is: 245.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.76 : 869.69 = 163.35 : x
  2. Step 2: Convert to fraction form
    579.76/869.69 = 163.35/x
  3. Step 3: Cross multiply
    579.76x = 869.69 × 163.35
  4. Step 4: Simplify right side
    579.76x = 142,063.86
  5. Step 5: Solve for x
    x = 142,063.86/579.76
  6. Step 6: Final answer
    x = 245.04

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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.