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Finding the Fourth Proportional to 515.25, 769.15 and 480.68

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Solution

The fourth proportional to 515.25, 769.15 and 480.68 is: 717.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.25 : 769.15 = 480.68 : x
  2. Step 2: Convert to fraction form
    515.25/769.15 = 480.68/x
  3. Step 3: Cross multiply
    515.25x = 769.15 × 480.68
  4. Step 4: Simplify right side
    515.25x = 369,711.78
  5. Step 5: Solve for x
    x = 369,711.78/515.25
  6. Step 6: Final answer
    x = 717.53

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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.