Home / 850.20-1,172.79-613.89

Finding the Fourth Proportional to 850.20, 1,172.79 and 613.89

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Solution

The fourth proportional to 850.20, 1,172.79 and 613.89 is: 846.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.20 : 1,172.79 = 613.89 : x
  2. Step 2: Convert to fraction form
    850.20/1,172.79 = 613.89/x
  3. Step 3: Cross multiply
    850.20x = 1,172.79 × 613.89
  4. Step 4: Simplify right side
    850.20x = 719,964.05
  5. Step 5: Solve for x
    x = 719,964.05/850.20
  6. Step 6: Final answer
    x = 846.82

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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.