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Finding the Fourth Proportional to 346.48, 520.26 and 331.09

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Solution

The fourth proportional to 346.48, 520.26 and 331.09 is: 497.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.48 : 520.26 = 331.09 : x
  2. Step 2: Convert to fraction form
    346.48/520.26 = 331.09/x
  3. Step 3: Cross multiply
    346.48x = 520.26 × 331.09
  4. Step 4: Simplify right side
    346.48x = 172,252.88
  5. Step 5: Solve for x
    x = 172,252.88/346.48
  6. Step 6: Final answer
    x = 497.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.