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Finding the Fourth Proportional to 850.32, 1,173.96 and 685.49

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Solution

The fourth proportional to 850.32, 1,173.96 and 685.49 is: 946.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.32 : 1,173.96 = 685.49 : x
  2. Step 2: Convert to fraction form
    850.32/1,173.96 = 685.49/x
  3. Step 3: Cross multiply
    850.32x = 1,173.96 × 685.49
  4. Step 4: Simplify right side
    850.32x = 804,731.97
  5. Step 5: Solve for x
    x = 804,731.97/850.32
  6. Step 6: Final answer
    x = 946.39

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1.5x scale

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.