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Finding the Fourth Proportional to 380.33, 527.03 and 357.21

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Solution

The fourth proportional to 380.33, 527.03 and 357.21 is: 494.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.33 : 527.03 = 357.21 : x
  2. Step 2: Convert to fraction form
    380.33/527.03 = 357.21/x
  3. Step 3: Cross multiply
    380.33x = 527.03 × 357.21
  4. Step 4: Simplify right side
    380.33x = 188,258.60
  5. Step 5: Solve for x
    x = 188,258.60/380.33
  6. Step 6: Final answer
    x = 494.99

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.