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Finding the Fourth Proportional to 850.24, 1,172.92 and 518.68

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Solution

The fourth proportional to 850.24, 1,172.92 and 518.68 is: 715.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.24 : 1,172.92 = 518.68 : x
  2. Step 2: Convert to fraction form
    850.24/1,172.92 = 518.68/x
  3. Step 3: Cross multiply
    850.24x = 1,172.92 × 518.68
  4. Step 4: Simplify right side
    850.24x = 608,370.15
  5. Step 5: Solve for x
    x = 608,370.15/850.24
  6. Step 6: Final answer
    x = 715.53

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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.