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Finding the Fourth Proportional to 413.60, 619.46 and 268.88

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Solution

The fourth proportional to 413.60, 619.46 and 268.88 is: 402.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.60 : 619.46 = 268.88 : x
  2. Step 2: Convert to fraction form
    413.60/619.46 = 268.88/x
  3. Step 3: Cross multiply
    413.60x = 619.46 × 268.88
  4. Step 4: Simplify right side
    413.60x = 166,560.40
  5. Step 5: Solve for x
    x = 166,560.40/413.60
  6. Step 6: Final answer
    x = 402.71

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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.