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Finding the Fourth Proportional to 413.01, 619.88 and 380.61

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Solution

The fourth proportional to 413.01, 619.88 and 380.61 is: 571.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.01 : 619.88 = 380.61 : x
  2. Step 2: Convert to fraction form
    413.01/619.88 = 380.61/x
  3. Step 3: Cross multiply
    413.01x = 619.88 × 380.61
  4. Step 4: Simplify right side
    413.01x = 235,930.62
  5. Step 5: Solve for x
    x = 235,930.62/413.01
  6. Step 6: Final answer
    x = 571.25

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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.