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Finding the Fourth Proportional to 413.88, 621.08 and 251.65

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Solution

The fourth proportional to 413.88, 621.08 and 251.65 is: 377.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.88 : 621.08 = 251.65 : x
  2. Step 2: Convert to fraction form
    413.88/621.08 = 251.65/x
  3. Step 3: Cross multiply
    413.88x = 621.08 × 251.65
  4. Step 4: Simplify right side
    413.88x = 156,294.78
  5. Step 5: Solve for x
    x = 156,294.78/413.88
  6. Step 6: Final answer
    x = 377.63

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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.