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Finding the Fourth Proportional to 657.24, 985.62 and 218.37

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Solution

The fourth proportional to 657.24, 985.62 and 218.37 is: 327.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.24 : 985.62 = 218.37 : x
  2. Step 2: Convert to fraction form
    657.24/985.62 = 218.37/x
  3. Step 3: Cross multiply
    657.24x = 985.62 × 218.37
  4. Step 4: Simplify right side
    657.24x = 215,229.84
  5. Step 5: Solve for x
    x = 215,229.84/657.24
  6. Step 6: Final answer
    x = 327.48

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.