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Finding the Fourth Proportional to 624.90, 936.73 and 405.49

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Solution

The fourth proportional to 624.90, 936.73 and 405.49 is: 607.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.90 : 936.73 = 405.49 : x
  2. Step 2: Convert to fraction form
    624.90/936.73 = 405.49/x
  3. Step 3: Cross multiply
    624.90x = 936.73 × 405.49
  4. Step 4: Simplify right side
    624.90x = 379,834.65
  5. Step 5: Solve for x
    x = 379,834.65/624.90
  6. Step 6: Final answer
    x = 607.83

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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.