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Finding the Fourth Proportional to 349.25, 482.05 and 201.90

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Solution

The fourth proportional to 349.25, 482.05 and 201.90 is: 278.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.25 : 482.05 = 201.90 : x
  2. Step 2: Convert to fraction form
    349.25/482.05 = 201.90/x
  3. Step 3: Cross multiply
    349.25x = 482.05 × 201.90
  4. Step 4: Simplify right side
    349.25x = 97,327.96
  5. Step 5: Solve for x
    x = 97,327.96/349.25
  6. Step 6: Final answer
    x = 278.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.