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Finding the Fourth Proportional to 579.32, 799.43 and 317.28

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Solution

The fourth proportional to 579.32, 799.43 and 317.28 is: 437.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.32 : 799.43 = 317.28 : x
  2. Step 2: Convert to fraction form
    579.32/799.43 = 317.28/x
  3. Step 3: Cross multiply
    579.32x = 799.43 × 317.28
  4. Step 4: Simplify right side
    579.32x = 253,641.56
  5. Step 5: Solve for x
    x = 253,641.56/579.32
  6. Step 6: Final answer
    x = 437.83

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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.