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Finding the Fourth Proportional to 1,143.75, 1,716.36 and 413.34

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Solution

The fourth proportional to 1,143.75, 1,716.36 and 413.34 is: 620.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.75 : 1,716.36 = 413.34 : x
  2. Step 2: Convert to fraction form
    1,143.75/1,716.36 = 413.34/x
  3. Step 3: Cross multiply
    1,143.75x = 1,716.36 × 413.34
  4. Step 4: Simplify right side
    1,143.75x = 709,440.24
  5. Step 5: Solve for x
    x = 709,440.24/1,143.75
  6. Step 6: Final answer
    x = 620.28

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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.