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Finding the Fourth Proportional to 413.87, 571.20 and 248.09

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Solution

The fourth proportional to 413.87, 571.20 and 248.09 is: 342.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.87 : 571.20 = 248.09 : x
  2. Step 2: Convert to fraction form
    413.87/571.20 = 248.09/x
  3. Step 3: Cross multiply
    413.87x = 571.20 × 248.09
  4. Step 4: Simplify right side
    413.87x = 141,709.01
  5. Step 5: Solve for x
    x = 141,709.01/413.87
  6. Step 6: Final answer
    x = 342.40

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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.