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Finding the Fourth Proportional to 579.52, 799.77 and 317.58

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Solution

The fourth proportional to 579.52, 799.77 and 317.58 is: 438.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.52 : 799.77 = 317.58 : x
  2. Step 2: Convert to fraction form
    579.52/799.77 = 317.58/x
  3. Step 3: Cross multiply
    579.52x = 799.77 × 317.58
  4. Step 4: Simplify right side
    579.52x = 253,990.96
  5. Step 5: Solve for x
    x = 253,990.96/579.52
  6. Step 6: Final answer
    x = 438.28

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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.