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Finding the Fourth Proportional to 382.88, 573.20 and 346.40

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Solution

The fourth proportional to 382.88, 573.20 and 346.40 is: 518.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.88 : 573.20 = 346.40 : x
  2. Step 2: Convert to fraction form
    382.88/573.20 = 346.40/x
  3. Step 3: Cross multiply
    382.88x = 573.20 × 346.40
  4. Step 4: Simplify right side
    382.88x = 198,556.48
  5. Step 5: Solve for x
    x = 198,556.48/382.88
  6. Step 6: Final answer
    x = 518.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.