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Finding the Fourth Proportional to 349.41, 521.70 and 308.49

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Solution

The fourth proportional to 349.41, 521.70 and 308.49 is: 460.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.41 : 521.70 = 308.49 : x
  2. Step 2: Convert to fraction form
    349.41/521.70 = 308.49/x
  3. Step 3: Cross multiply
    349.41x = 521.70 × 308.49
  4. Step 4: Simplify right side
    349.41x = 160,939.23
  5. Step 5: Solve for x
    x = 160,939.23/349.41
  6. Step 6: Final answer
    x = 460.60

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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.