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Finding the Fourth Proportional to 418.23, 622.89 and 413.37

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Solution

The fourth proportional to 418.23, 622.89 and 413.37 is: 615.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.23 : 622.89 = 413.37 : x
  2. Step 2: Convert to fraction form
    418.23/622.89 = 413.37/x
  3. Step 3: Cross multiply
    418.23x = 622.89 × 413.37
  4. Step 4: Simplify right side
    418.23x = 257,484.04
  5. Step 5: Solve for x
    x = 257,484.04/418.23
  6. Step 6: Final answer
    x = 615.65

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.