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Finding the Fourth Proportional to 520.20, 717.93 and 310.37

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Solution

The fourth proportional to 520.20, 717.93 and 310.37 is: 428.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.20 : 717.93 = 310.37 : x
  2. Step 2: Convert to fraction form
    520.20/717.93 = 310.37/x
  3. Step 3: Cross multiply
    520.20x = 717.93 × 310.37
  4. Step 4: Simplify right side
    520.20x = 222,820.34
  5. Step 5: Solve for x
    x = 222,820.34/520.20
  6. Step 6: Final answer
    x = 428.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.