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Finding the Fourth Proportional to 327.16, 450.66 and 307.72

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Solution

The fourth proportional to 327.16, 450.66 and 307.72 is: 423.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.16 : 450.66 = 307.72 : x
  2. Step 2: Convert to fraction form
    327.16/450.66 = 307.72/x
  3. Step 3: Cross multiply
    327.16x = 450.66 × 307.72
  4. Step 4: Simplify right side
    327.16x = 138,677.10
  5. Step 5: Solve for x
    x = 138,677.10/327.16
  6. Step 6: Final answer
    x = 423.88

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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.