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Finding the Fourth Proportional to 520.69, 779.95 and 404.73

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Solution

The fourth proportional to 520.69, 779.95 and 404.73 is: 606.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.69 : 779.95 = 404.73 : x
  2. Step 2: Convert to fraction form
    520.69/779.95 = 404.73/x
  3. Step 3: Cross multiply
    520.69x = 779.95 × 404.73
  4. Step 4: Simplify right side
    520.69x = 315,669.16
  5. Step 5: Solve for x
    x = 315,669.16/520.69
  6. Step 6: Final answer
    x = 606.25

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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.