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Finding the Fourth Proportional to 349.90, 481.33 and 315.07

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Solution

The fourth proportional to 349.90, 481.33 and 315.07 is: 433.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    349.90 : 481.33 = 315.07 : x
  2. Step 2: Convert to fraction form
    349.90/481.33 = 315.07/x
  3. Step 3: Cross multiply
    349.90x = 481.33 × 315.07
  4. Step 4: Simplify right side
    349.90x = 151,652.64
  5. Step 5: Solve for x
    x = 151,652.64/349.90
  6. Step 6: Final answer
    x = 433.42

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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.