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Finding the Fourth Proportional to 696.36, 960.60 and 486.66

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Solution

The fourth proportional to 696.36, 960.60 and 486.66 is: 671.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.36 : 960.60 = 486.66 : x
  2. Step 2: Convert to fraction form
    696.36/960.60 = 486.66/x
  3. Step 3: Cross multiply
    696.36x = 960.60 × 486.66
  4. Step 4: Simplify right side
    696.36x = 467,485.60
  5. Step 5: Solve for x
    x = 467,485.60/696.36
  6. Step 6: Final answer
    x = 671.33

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Half scale
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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.