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Finding the Fourth Proportional to 390.29, 588.37 and 363.87

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Solution

The fourth proportional to 390.29, 588.37 and 363.87 is: 548.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    390.29 : 588.37 = 363.87 : x
  2. Step 2: Convert to fraction form
    390.29/588.37 = 363.87/x
  3. Step 3: Cross multiply
    390.29x = 588.37 × 363.87
  4. Step 4: Simplify right side
    390.29x = 214,089.28
  5. Step 5: Solve for x
    x = 214,089.28/390.29
  6. Step 6: Final answer
    x = 548.54

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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.