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Finding the Fourth Proportional to 745.09, 1,028.23 and 413.52

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Solution

The fourth proportional to 745.09, 1,028.23 and 413.52 is: 570.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.09 : 1,028.23 = 413.52 : x
  2. Step 2: Convert to fraction form
    745.09/1,028.23 = 413.52/x
  3. Step 3: Cross multiply
    745.09x = 1,028.23 × 413.52
  4. Step 4: Simplify right side
    745.09x = 425,188.00
  5. Step 5: Solve for x
    x = 425,188.00/745.09
  6. Step 6: Final answer
    x = 570.65

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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.