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Finding the Fourth Proportional to 319.16, 440.34 and 220.88

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Solution

The fourth proportional to 319.16, 440.34 and 220.88 is: 304.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.16 : 440.34 = 220.88 : x
  2. Step 2: Convert to fraction form
    319.16/440.34 = 220.88/x
  3. Step 3: Cross multiply
    319.16x = 440.34 × 220.88
  4. Step 4: Simplify right side
    319.16x = 97,262.30
  5. Step 5: Solve for x
    x = 97,262.30/319.16
  6. Step 6: Final answer
    x = 304.74

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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.