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Finding the Fourth Proportional to 510.82, 765.31 and 327.76

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Solution

The fourth proportional to 510.82, 765.31 and 327.76 is: 491.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.82 : 765.31 = 327.76 : x
  2. Step 2: Convert to fraction form
    510.82/765.31 = 327.76/x
  3. Step 3: Cross multiply
    510.82x = 765.31 × 327.76
  4. Step 4: Simplify right side
    510.82x = 250,838.01
  5. Step 5: Solve for x
    x = 250,838.01/510.82
  6. Step 6: Final answer
    x = 491.05

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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.