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Finding the Fourth Proportional to 579.44, 869.09 and 146.56

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Solution

The fourth proportional to 579.44, 869.09 and 146.56 is: 219.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.44 : 869.09 = 146.56 : x
  2. Step 2: Convert to fraction form
    579.44/869.09 = 146.56/x
  3. Step 3: Cross multiply
    579.44x = 869.09 × 146.56
  4. Step 4: Simplify right side
    579.44x = 127,373.83
  5. Step 5: Solve for x
    x = 127,373.83/579.44
  6. Step 6: Final answer
    x = 219.82

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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.