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Finding the Fourth Proportional to 744.85, 1,027.81 and 413.23

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Solution

The fourth proportional to 744.85, 1,027.81 and 413.23 is: 570.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.85 : 1,027.81 = 413.23 : x
  2. Step 2: Convert to fraction form
    744.85/1,027.81 = 413.23/x
  3. Step 3: Cross multiply
    744.85x = 1,027.81 × 413.23
  4. Step 4: Simplify right side
    744.85x = 424,721.93
  5. Step 5: Solve for x
    x = 424,721.93/744.85
  6. Step 6: Final answer
    x = 570.21

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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.