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Finding the Fourth Proportional to 573.70, 855.78 and 518.34

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Solution

The fourth proportional to 573.70, 855.78 and 518.34 is: 773.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.70 : 855.78 = 518.34 : x
  2. Step 2: Convert to fraction form
    573.70/855.78 = 518.34/x
  3. Step 3: Cross multiply
    573.70x = 855.78 × 518.34
  4. Step 4: Simplify right side
    573.70x = 443,580.27
  5. Step 5: Solve for x
    x = 443,580.27/573.70
  6. Step 6: Final answer
    x = 773.19

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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.