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Finding the Fourth Proportional to 515.41, 768.22 and 486.23

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Solution

The fourth proportional to 515.41, 768.22 and 486.23 is: 724.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.41 : 768.22 = 486.23 : x
  2. Step 2: Convert to fraction form
    515.41/768.22 = 486.23/x
  3. Step 3: Cross multiply
    515.41x = 768.22 × 486.23
  4. Step 4: Simplify right side
    515.41x = 373,531.61
  5. Step 5: Solve for x
    x = 373,531.61/515.41
  6. Step 6: Final answer
    x = 724.73

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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.