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Finding the Fourth Proportional to 510.73, 765.68 and 218.46

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Solution

The fourth proportional to 510.73, 765.68 and 218.46 is: 327.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.73 : 765.68 = 218.46 : x
  2. Step 2: Convert to fraction form
    510.73/765.68 = 218.46/x
  3. Step 3: Cross multiply
    510.73x = 765.68 × 218.46
  4. Step 4: Simplify right side
    510.73x = 167,266.49
  5. Step 5: Solve for x
    x = 167,266.49/510.73
  6. Step 6: Final answer
    x = 327.50

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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.