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Finding the Fourth Proportional to 850.28, 1,172.82 and 518.52

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Solution

The fourth proportional to 850.28, 1,172.82 and 518.52 is: 715.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.28 : 1,172.82 = 518.52 : x
  2. Step 2: Convert to fraction form
    850.28/1,172.82 = 518.52/x
  3. Step 3: Cross multiply
    850.28x = 1,172.82 × 518.52
  4. Step 4: Simplify right side
    850.28x = 608,130.63
  5. Step 5: Solve for x
    x = 608,130.63/850.28
  6. Step 6: Final answer
    x = 715.21

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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.