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Finding the Fourth Proportional to 734.96, 1,019.75 and 728.69

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Solution

The fourth proportional to 734.96, 1,019.75 and 728.69 is: 1,011.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.96 : 1,019.75 = 728.69 : x
  2. Step 2: Convert to fraction form
    734.96/1,019.75 = 728.69/x
  3. Step 3: Cross multiply
    734.96x = 1,019.75 × 728.69
  4. Step 4: Simplify right side
    734.96x = 743,072.89
  5. Step 5: Solve for x
    x = 743,072.89/734.96
  6. Step 6: Final answer
    x = 1,011.05

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.