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Finding the Fourth Proportional to 386.55, 582.61 and 333.09

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Solution

The fourth proportional to 386.55, 582.61 and 333.09 is: 502.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.55 : 582.61 = 333.09 : x
  2. Step 2: Convert to fraction form
    386.55/582.61 = 333.09/x
  3. Step 3: Cross multiply
    386.55x = 582.61 × 333.09
  4. Step 4: Simplify right side
    386.55x = 194,061.56
  5. Step 5: Solve for x
    x = 194,061.56/386.55
  6. Step 6: Final answer
    x = 502.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.