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Finding the Fourth Proportional to 579.50, 798.74 and 439.57

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Solution

The fourth proportional to 579.50, 798.74 and 439.57 is: 605.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.50 : 798.74 = 439.57 : x
  2. Step 2: Convert to fraction form
    579.50/798.74 = 439.57/x
  3. Step 3: Cross multiply
    579.50x = 798.74 × 439.57
  4. Step 4: Simplify right side
    579.50x = 351,102.14
  5. Step 5: Solve for x
    x = 351,102.14/579.50
  6. Step 6: Final answer
    x = 605.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.