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Finding the Fourth Proportional to 850.24, 1,172.28 and 725.68

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Solution

The fourth proportional to 850.24, 1,172.28 and 725.68 is: 1,000.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.24 : 1,172.28 = 725.68 : x
  2. Step 2: Convert to fraction form
    850.24/1,172.28 = 725.68/x
  3. Step 3: Cross multiply
    850.24x = 1,172.28 × 725.68
  4. Step 4: Simplify right side
    850.24x = 850,700.15
  5. Step 5: Solve for x
    x = 850,700.15/850.24
  6. Step 6: Final answer
    x = 1,000.54

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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.