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Finding the Fourth Proportional to 1,413.49, 2,120.22 and 633.31

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Solution

The fourth proportional to 1,413.49, 2,120.22 and 633.31 is: 949.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,413.49 : 2,120.22 = 633.31 : x
  2. Step 2: Convert to fraction form
    1,413.49/2,120.22 = 633.31/x
  3. Step 3: Cross multiply
    1,413.49x = 2,120.22 × 633.31
  4. Step 4: Simplify right side
    1,413.49x = 1,342,756.53
  5. Step 5: Solve for x
    x = 1,342,756.53/1,413.49
  6. Step 6: Final answer
    x = 949.96

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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.