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Finding the Fourth Proportional to 467.64, 645.62 and 310.49

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Solution

The fourth proportional to 467.64, 645.62 and 310.49 is: 428.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.64 : 645.62 = 310.49 : x
  2. Step 2: Convert to fraction form
    467.64/645.62 = 310.49/x
  3. Step 3: Cross multiply
    467.64x = 645.62 × 310.49
  4. Step 4: Simplify right side
    467.64x = 200,456.97
  5. Step 5: Solve for x
    x = 200,456.97/467.64
  6. Step 6: Final answer
    x = 428.65

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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.