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Finding the Fourth Proportional to 696.24, 960.30 and 685.44

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Solution

The fourth proportional to 696.24, 960.30 and 685.44 is: 945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.24 : 960.30 = 685.44 : x
  2. Step 2: Convert to fraction form
    696.24/960.30 = 685.44/x
  3. Step 3: Cross multiply
    696.24x = 960.30 × 685.44
  4. Step 4: Simplify right side
    696.24x = 658,228.03
  5. Step 5: Solve for x
    x = 658,228.03/696.24
  6. Step 6: Final answer
    x = 945.40

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Double scale
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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.