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Finding the Fourth Proportional to 579.12, 869.02 and 443.04

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Solution

The fourth proportional to 579.12, 869.02 and 443.04 is: 664.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.12 : 869.02 = 443.04 : x
  2. Step 2: Convert to fraction form
    579.12/869.02 = 443.04/x
  3. Step 3: Cross multiply
    579.12x = 869.02 × 443.04
  4. Step 4: Simplify right side
    579.12x = 385,010.62
  5. Step 5: Solve for x
    x = 385,010.62/579.12
  6. Step 6: Final answer
    x = 664.82

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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.