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Finding the Fourth Proportional to 579.72, 799.98 and 317.69

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Solution

The fourth proportional to 579.72, 799.98 and 317.69 is: 438.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.72 : 799.98 = 317.69 : x
  2. Step 2: Convert to fraction form
    579.72/799.98 = 317.69/x
  3. Step 3: Cross multiply
    579.72x = 799.98 × 317.69
  4. Step 4: Simplify right side
    579.72x = 254,145.65
  5. Step 5: Solve for x
    x = 254,145.65/579.72
  6. Step 6: Final answer
    x = 438.39

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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.