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Finding the Fourth Proportional to 510.88, 765.60 and 382.72

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Solution

The fourth proportional to 510.88, 765.60 and 382.72 is: 573.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.88 : 765.60 = 382.72 : x
  2. Step 2: Convert to fraction form
    510.88/765.60 = 382.72/x
  3. Step 3: Cross multiply
    510.88x = 765.60 × 382.72
  4. Step 4: Simplify right side
    510.88x = 293,010.43
  5. Step 5: Solve for x
    x = 293,010.43/510.88
  6. Step 6: Final answer
    x = 573.54

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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.