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Finding the Fourth Proportional to 510.25, 763.70 and 361.72

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Solution

The fourth proportional to 510.25, 763.70 and 361.72 is: 541.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.25 : 763.70 = 361.72 : x
  2. Step 2: Convert to fraction form
    510.25/763.70 = 361.72/x
  3. Step 3: Cross multiply
    510.25x = 763.70 × 361.72
  4. Step 4: Simplify right side
    510.25x = 276,245.56
  5. Step 5: Solve for x
    x = 276,245.56/510.25
  6. Step 6: Final answer
    x = 541.39

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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.