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Finding the Fourth Proportional to 510.41, 765.66 and 279.20

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Solution

The fourth proportional to 510.41, 765.66 and 279.20 is: 418.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.41 : 765.66 = 279.20 : x
  2. Step 2: Convert to fraction form
    510.41/765.66 = 279.20/x
  3. Step 3: Cross multiply
    510.41x = 765.66 × 279.20
  4. Step 4: Simplify right side
    510.41x = 213,772.27
  5. Step 5: Solve for x
    x = 213,772.27/510.41
  6. Step 6: Final answer
    x = 418.82

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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.