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Finding the Fourth Proportional to 579.36, 799.50 and 317.39

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Solution

The fourth proportional to 579.36, 799.50 and 317.39 is: 437.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.36 : 799.50 = 317.39 : x
  2. Step 2: Convert to fraction form
    579.36/799.50 = 317.39/x
  3. Step 3: Cross multiply
    579.36x = 799.50 × 317.39
  4. Step 4: Simplify right side
    579.36x = 253,749.31
  5. Step 5: Solve for x
    x = 253,749.31/579.36
  6. Step 6: Final answer
    x = 437.98

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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.