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Finding the Fourth Proportional to 518.08, 714.96 and 321.94

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Solution

The fourth proportional to 518.08, 714.96 and 321.94 is: 444.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.08 : 714.96 = 321.94 : x
  2. Step 2: Convert to fraction form
    518.08/714.96 = 321.94/x
  3. Step 3: Cross multiply
    518.08x = 714.96 × 321.94
  4. Step 4: Simplify right side
    518.08x = 230,174.22
  5. Step 5: Solve for x
    x = 230,174.22/518.08
  6. Step 6: Final answer
    x = 444.28

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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.