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Finding the Fourth Proportional to 579.60, 799.82 and 317.60

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Solution

The fourth proportional to 579.60, 799.82 and 317.60 is: 438.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.60 : 799.82 = 317.60 : x
  2. Step 2: Convert to fraction form
    579.60/799.82 = 317.60/x
  3. Step 3: Cross multiply
    579.60x = 799.82 × 317.60
  4. Step 4: Simplify right side
    579.60x = 254,022.83
  5. Step 5: Solve for x
    x = 254,022.83/579.60
  6. Step 6: Final answer
    x = 438.27

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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.