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Finding the Fourth Proportional to 579.56, 868.65 and 490.37

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Solution

The fourth proportional to 579.56, 868.65 and 490.37 is: 734.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.56 : 868.65 = 490.37 : x
  2. Step 2: Convert to fraction form
    579.56/868.65 = 490.37/x
  3. Step 3: Cross multiply
    579.56x = 868.65 × 490.37
  4. Step 4: Simplify right side
    579.56x = 425,956.32
  5. Step 5: Solve for x
    x = 425,956.32/579.56
  6. Step 6: Final answer
    x = 734.97

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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.