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Finding the Fourth Proportional to 850.08, 1,172.89 and 518.49

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Solution

The fourth proportional to 850.08, 1,172.89 and 518.49 is: 715.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.08 : 1,172.89 = 518.49 : x
  2. Step 2: Convert to fraction form
    850.08/1,172.89 = 518.49/x
  3. Step 3: Cross multiply
    850.08x = 1,172.89 × 518.49
  4. Step 4: Simplify right side
    850.08x = 608,125.07
  5. Step 5: Solve for x
    x = 608,125.07/850.08
  6. Step 6: Final answer
    x = 715.37

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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.