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Finding the Fourth Proportional to 579.93, 864.73 and 515.54

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Solution

The fourth proportional to 579.93, 864.73 and 515.54 is: 768.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.93 : 864.73 = 515.54 : x
  2. Step 2: Convert to fraction form
    579.93/864.73 = 515.54/x
  3. Step 3: Cross multiply
    579.93x = 864.73 × 515.54
  4. Step 4: Simplify right side
    579.93x = 445,797.95
  5. Step 5: Solve for x
    x = 445,797.95/579.93
  6. Step 6: Final answer
    x = 768.71

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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.