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Finding the Fourth Proportional to 850.74, 1,173.37 and 571.29

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Solution

The fourth proportional to 850.74, 1,173.37 and 571.29 is: 787.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.74 : 1,173.37 = 571.29 : x
  2. Step 2: Convert to fraction form
    850.74/1,173.37 = 571.29/x
  3. Step 3: Cross multiply
    850.74x = 1,173.37 × 571.29
  4. Step 4: Simplify right side
    850.74x = 670,334.55
  5. Step 5: Solve for x
    x = 670,334.55/850.74
  6. Step 6: Final answer
    x = 787.94

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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.