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Finding the Fourth Proportional to 579.56, 869.38 and 189.46

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Solution

The fourth proportional to 579.56, 869.38 and 189.46 is: 284.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.56 : 869.38 = 189.46 : x
  2. Step 2: Convert to fraction form
    579.56/869.38 = 189.46/x
  3. Step 3: Cross multiply
    579.56x = 869.38 × 189.46
  4. Step 4: Simplify right side
    579.56x = 164,708.72
  5. Step 5: Solve for x
    x = 164,708.72/579.56
  6. Step 6: Final answer
    x = 284.20

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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.