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Finding the Fourth Proportional to 515.92, 769.52 and 506.20

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Solution

The fourth proportional to 515.92, 769.52 and 506.20 is: 755.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.92 : 769.52 = 506.20 : x
  2. Step 2: Convert to fraction form
    515.92/769.52 = 506.20/x
  3. Step 3: Cross multiply
    515.92x = 769.52 × 506.20
  4. Step 4: Simplify right side
    515.92x = 389,531.02
  5. Step 5: Solve for x
    x = 389,531.02/515.92
  6. Step 6: Final answer
    x = 755.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.