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Finding the Fourth Proportional to 349.33, 521.45 and 308.80

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Solution

The fourth proportional to 349.33, 521.45 and 308.80 is: 460.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.33 : 521.45 = 308.80 : x
  2. Step 2: Convert to fraction form
    349.33/521.45 = 308.80/x
  3. Step 3: Cross multiply
    349.33x = 521.45 × 308.80
  4. Step 4: Simplify right side
    349.33x = 161,023.76
  5. Step 5: Solve for x
    x = 161,023.76/349.33
  6. Step 6: Final answer
    x = 460.95

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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.