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Finding the Fourth Proportional to 712.73, 982.60 and 697.21

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Solution

The fourth proportional to 712.73, 982.60 and 697.21 is: 961.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.73 : 982.60 = 697.21 : x
  2. Step 2: Convert to fraction form
    712.73/982.60 = 697.21/x
  3. Step 3: Cross multiply
    712.73x = 982.60 × 697.21
  4. Step 4: Simplify right side
    712.73x = 685,074.35
  5. Step 5: Solve for x
    x = 685,074.35/712.73
  6. Step 6: Final answer
    x = 961.19

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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.