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Finding the Fourth Proportional to 850.22, 1,173.06 and 518.78

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Solution

The fourth proportional to 850.22, 1,173.06 and 518.78 is: 715.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.22 : 1,173.06 = 518.78 : x
  2. Step 2: Convert to fraction form
    850.22/1,173.06 = 518.78/x
  3. Step 3: Cross multiply
    850.22x = 1,173.06 × 518.78
  4. Step 4: Simplify right side
    850.22x = 608,560.07
  5. Step 5: Solve for x
    x = 608,560.07/850.22
  6. Step 6: Final answer
    x = 715.77

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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.