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Finding the Fourth Proportional to 520, 778.89 and 336.85

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Solution

The fourth proportional to 520, 778.89 and 336.85 is: 504.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    520 : 778.89 = 336.85 : x
  2. Step 2: Convert to fraction form
    520/778.89 = 336.85/x
  3. Step 3: Cross multiply
    520x = 778.89 × 336.85
  4. Step 4: Simplify right side
    520x = 262,369.10
  5. Step 5: Solve for x
    x = 262,369.10/520
  6. Step 6: Final answer
    x = 504.56

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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.