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Finding the Fourth Proportional to 724.39, 999.60 and 413.89

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Solution

The fourth proportional to 724.39, 999.60 and 413.89 is: 571.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    724.39 : 999.60 = 413.89 : x
  2. Step 2: Convert to fraction form
    724.39/999.60 = 413.89/x
  3. Step 3: Cross multiply
    724.39x = 999.60 × 413.89
  4. Step 4: Simplify right side
    724.39x = 413,724.44
  5. Step 5: Solve for x
    x = 413,724.44/724.39
  6. Step 6: Final answer
    x = 571.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.