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Finding the Fourth Proportional to 608.73, 908.90 and 521.93

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Solution

The fourth proportional to 608.73, 908.90 and 521.93 is: 779.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.73 : 908.90 = 521.93 : x
  2. Step 2: Convert to fraction form
    608.73/908.90 = 521.93/x
  3. Step 3: Cross multiply
    608.73x = 908.90 × 521.93
  4. Step 4: Simplify right side
    608.73x = 474,379.57
  5. Step 5: Solve for x
    x = 474,379.57/608.73
  6. Step 6: Final answer
    x = 779.29

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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.