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Finding the Fourth Proportional to 349.16, 520.85 and 330.92

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Solution

The fourth proportional to 349.16, 520.85 and 330.92 is: 493.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.16 : 520.85 = 330.92 : x
  2. Step 2: Convert to fraction form
    349.16/520.85 = 330.92/x
  3. Step 3: Cross multiply
    349.16x = 520.85 × 330.92
  4. Step 4: Simplify right side
    349.16x = 172,359.68
  5. Step 5: Solve for x
    x = 172,359.68/349.16
  6. Step 6: Final answer
    x = 493.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.