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Finding the Fourth Proportional to 744.02, 1,115.22 and 663.02

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Solution

The fourth proportional to 744.02, 1,115.22 and 663.02 is: 993.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.02 : 1,115.22 = 663.02 : x
  2. Step 2: Convert to fraction form
    744.02/1,115.22 = 663.02/x
  3. Step 3: Cross multiply
    744.02x = 1,115.22 × 663.02
  4. Step 4: Simplify right side
    744.02x = 739,413.16
  5. Step 5: Solve for x
    x = 739,413.16/744.02
  6. Step 6: Final answer
    x = 993.81

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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.