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Finding the Fourth Proportional to 737.68, 1,105.12 and 413.28

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Solution

The fourth proportional to 737.68, 1,105.12 and 413.28 is: 619.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.68 : 1,105.12 = 413.28 : x
  2. Step 2: Convert to fraction form
    737.68/1,105.12 = 413.28/x
  3. Step 3: Cross multiply
    737.68x = 1,105.12 × 413.28
  4. Step 4: Simplify right side
    737.68x = 456,723.99
  5. Step 5: Solve for x
    x = 456,723.99/737.68
  6. Step 6: Final answer
    x = 619.14

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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.