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Finding the Fourth Proportional to 579.43, 799.64 and 317.44

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Solution

The fourth proportional to 579.43, 799.64 and 317.44 is: 438.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.43 : 799.64 = 317.44 : x
  2. Step 2: Convert to fraction form
    579.43/799.64 = 317.44/x
  3. Step 3: Cross multiply
    579.43x = 799.64 × 317.44
  4. Step 4: Simplify right side
    579.43x = 253,837.72
  5. Step 5: Solve for x
    x = 253,837.72/579.43
  6. Step 6: Final answer
    x = 438.08

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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.