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Finding the Fourth Proportional to 349.98, 521.55 and 339.41

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Solution

The fourth proportional to 349.98, 521.55 and 339.41 is: 505.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.98 : 521.55 = 339.41 : x
  2. Step 2: Convert to fraction form
    349.98/521.55 = 339.41/x
  3. Step 3: Cross multiply
    349.98x = 521.55 × 339.41
  4. Step 4: Simplify right side
    349.98x = 177,020.59
  5. Step 5: Solve for x
    x = 177,020.59/349.98
  6. Step 6: Final answer
    x = 505.81

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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.