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Finding the Fourth Proportional to 661.48, 992.22 and 222.73

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Solution

The fourth proportional to 661.48, 992.22 and 222.73 is: 334.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661.48 : 992.22 = 222.73 : x
  2. Step 2: Convert to fraction form
    661.48/992.22 = 222.73/x
  3. Step 3: Cross multiply
    661.48x = 992.22 × 222.73
  4. Step 4: Simplify right side
    661.48x = 220,997.16
  5. Step 5: Solve for x
    x = 220,997.16/661.48
  6. Step 6: Final answer
    x = 334.10

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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.