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Finding the Fourth Proportional to 518.30, 776.90 and 335.82

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Solution

The fourth proportional to 518.30, 776.90 and 335.82 is: 503.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.30 : 776.90 = 335.82 : x
  2. Step 2: Convert to fraction form
    518.30/776.90 = 335.82/x
  3. Step 3: Cross multiply
    518.30x = 776.90 × 335.82
  4. Step 4: Simplify right side
    518.30x = 260,898.56
  5. Step 5: Solve for x
    x = 260,898.56/518.30
  6. Step 6: Final answer
    x = 503.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.